Baby-Sitters Little Sister Books in Order
Baby-Sitters Little Sister is an 86-book series by Ann M. Martin for ages 9–12, at a grades 2–4 reading level, with gentle to moderate content (HootRated intensity 1–3 out of 5).
- Books
- 86
- By publication date
- Content intensity
- Gentle to moderate
- HootRated 1–3 out of 5 · avg 1.3
Baby-Sitters Little Sister Reading Order
Series numbers aren't available for most Baby-Sitters Little Sister books, so they're listed by publication date (oldest first).
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | Karen's witch 1988 | Level 2-3 | 9-12 | Gentle |
| 2 | Karen's Little Sister 1989 | Level 3 | 9-12 | Gentle |
| 3 | Karen's School Picture 1989 | Level 3-4 | 9-12 | Gentle |
| 4 | Karen's haircut 1990 | Level 3 | 9-12 | Gentle |
| 5 | Karen's kittycat club 1990 | Level 2-3 | 9-12 | Mild |
| 6 | Karen's prize. 1990 | Level 2-3 | 9-12 | Mild |
| 7 | Karen's surprise Baby-sitters Little Sister #13 Book 13 · 1990 | Level 3-4 | 9-12 | Gentle |
| 8 | Karen's wish 1990 | Level 3 | 9-12 | Moderate |
| 9 | Karen's worst day 1990 | Level 2-3 | 9-12 | Gentle |
| 10 | Karen's carnival 1991 | Level 2-3 | 9-12 | Gentle |
| 11 | Karen's goldfish 1991 | Level 3 | 9-12 | Mild |
| 12 | Karen's good-bye 1991 | Level 2-3 | 9-12 | Gentle |
| 13 | Karen's home run 1991 | Level 2-3 | 9-12 | Gentle |
| 14 | Karen's mystery 1991 | Level 2-3 | 9-12 | Gentle |
| 15 | Karen's Plane Trip 1991 | Level 2-3 | 9-12 | Gentle |
| 16 | Karen's sleepover 1991 | Level 2-3 | 9-12 | Mild |
| 17 | Karen's baby 1992 | Level 2-3 | 9-12 | Gentle |
| 18 | Karen's big joke 1992 | Level 2-3 | 9-12 | Gentle |
| 19 | Karen's bully 1992 | Level 2-3 | 9-12 | Mild |
| 20 | Karen's kittens 1992 | Level 2-3 | 9-12 | Gentle |
| 21 | Karen's secret 1992 | Level 2-3 | 9-12 | Mild |
| 22 | Karen's tea party 1992 | Level 2-3 | 9-12 | Mild |
| 23 | Bsls #39 Karen's Wedding (Baby-Sitters Little Sister) Book 39 · 1993 | Level 3 | 9-12 | Gentle |
| 24 | Karen's Big Lie (Baby-Sitter's Little Sister #38) Book 38 · 1993 | Level 3-4 | 9-12 | Gentle |
| 25 | Karen's Campout 1993 | Level 3-4 | 9-12 | Gentle |
| 26 | Karen's doll hospital 1993 | Level 3 | 9-12 | Gentle |
| 27 | Karen's newspaper 1993 | Level 3-4 | 9-12 | Mild |
| 28 | Karen's pizza party 1993 | Level 3-4 | 9-12 | Gentle |
| 29 | Karen's school 1993 | Level 3 | 9-12 | Mild |
| 30 | Karen's toothache 1993 | Level 3-4 | 9-12 | Mild |
| 31 | Karen's Baby-Sitter 1994 | Level 3 | 9-12 | Gentle |
| 32 | Karen's big top 1994 | Level 3 | 9-12 | Mild |
| 33 | Karen's Candy 1994 | Level 2-3 | 9-12 | Gentle |
| 34 | Karen's Kite 1994 | Level 3-4 | 9-12 | Gentle |
| 35 | Karen's Lucky Penny 1994 | Level 3 | 9-12 | Gentle |
| 36 | Karen's Mermaid 1994 | Level 3 | 9-12 | Gentle |
| 37 | Karen's School Bus Baby-sitters Little Sitter #53 Book 53 · 1994 | Level 2-3 | 9-12 | Gentle |
| 38 | Karen's stepmother 1994 | Level 3 | 9-12 | Mild |
| 39 | Karen's Two Families 1994 | Level 2-3 | 9-12 | Mild |
| 40 | Karen's Monsters (Baby-Sitters Little Sister) 1995 | Level 3 | 9-12 | Gentle |
| 41 | Karen's new bike 1995 | Level 3 | 9-12 | Gentle |
| 42 | Karen's Ski Trip 1995 | Level 3-4 | 9-12 | Gentle |
| 43 | Karen's Tattletale 1995 | Level 3 | 9-12 | Gentle |
| 44 | Karen's Toys 1995 | Level 3-4 | 9-12 | Mild |
| 45 | Karen's turkey day 1995 | Level 3-4 | 9-12 | Mild |
| 46 | Karen's Big Fight 1996 | Level 3-4 | 9-12 | Gentle |
| 47 | Karen's big sister 1996 | Level 3-4 | 9-12 | Mild |
| 48 | Karen's Christmas tree 1996 | Level 3-4 | 9-12 | Mild |
| 49 | Karen's County Fair (Baby-Sitters Little Sister) 1996 | Level 3 | 9-12 | Gentle |
| 50 | Karen's Half Birthday (Baby-Sitters Little Sister) 1996 | Level 3-4 | 9-12 | Gentle |
| 51 | Karen's Island Adventure 1996 | Level 3-4 | 9-12 | Mild |
| 52 | Karen's Magic Garden 1996 | Level 3-4 | 9-12 | Gentle |
| 53 | Karen's Big Job 1997 | Level 3-4 | 9-12 | Gentle |
| 54 | Karen's Bunny 1997 | Level 3-4 | 9-12 | Gentle |
| 55 | Karen's New Puppy 1997 | Level 3 | 9-12 | Gentle |
| 56 | Karen's Pilgrim (Baby-Sitters Little Sister) 1997 | Level 3-4 | 9-12 | Gentle |
| 57 | Karen's pony camp 1997 | Level 3-4 | 9-12 | Gentle |
| 58 | Karen's unicorn 1997 | Level 3-4 | 9-12 | Gentle |
| 59 | Bsls #99 Karen's Big City Mystery (Baby-Sitters Little Sister) Book 99 · 1998 | Level 3-4 | 9-12 | Gentle |
| 60 | Karen's Big Move (Baby-Sitters Little Sister) 1998 | Level 3-4 | 9-12 | Gentle |
| 61 | Karen's Black Cat (Baby-Sitters Little Sister) 1998 | Level 3-4 | 9-12 | Gentle |
| 62 | Karen's Chain Letter (Baby-Sitters Little Sister) 1998 | Level 3-4 | 9-12 | Mild |
| 63 | Karen's Fishing Trip (Baby-Sitters Little Sister) 1998 | Level 3-4 | 9-12 | Gentle |
| 64 | Karen's Promise 1998 | Level 4-5 | 9-12 | Gentle |
| 65 | Karen's Snow Princess 1998 | Level 3-4 | 9-12 | Gentle |
| 66 | Karen's New Holiday (Baby-Sitter's Little Sister #112) Book 112 · 1999 | Level 3-4 | 9-12 | Gentle |
| 67 | Karen's runaway turkey 1999 | Level 3-4 | 9-12 | Gentle |
| 68 | Karen's Show and Share 1999 | Level 3-4 | 9-12 | Gentle |
| 69 | Karen's Spy Mystery 1999 | Level 3-4 | 9-12 | Mild |
| 70 | Karen's Swim Meet 1999 | Level 3-4 | 9-12 | Gentle |
| 71 | Karen's cowboy 2000 | Level 4-5 | 9-12 | Gentle |
| 72 | Karen's Easter parade 2000 | Level 3-4 | 9-12 | Gentle |
| 73 | Karen's gift 2000 | Level 3-4 | 9-12 | Gentle |
| 74 | Karen's yo-yo 2000 | Level 4-5 | 9-12 | Mild |
| 75 | Karen's birthday | Level 3 | 9-12 | Mild |
| 76 | Karen's Cartwheel | Level 2-3 | 9-12 | Gentle |
| 77 | Karen's Ducklings | Level 3-4 | 9-12 | Gentle |
| 78 | Karen's ghost | Level 3-4 | 9-12 | Gentle |
| 79 | Karen's ice skates | Level 3-4 | 9-12 | Mild |
| 80 | Karen's in Love | Level 3 | 9-12 | Gentle |
| 81 | Karen's lemonade stand | Level 3-4 | 9-12 | Gentle |
| 82 | Karen's Nanny | Level 3-4 | 9-12 | Mild |
| 83 | Karen's new friend | Level 2-3 | 9-12 | Gentle |
| 84 | Karen's new teacher | Level 3 | 9-12 | Gentle |
| 85 | Karen's Paper Route (Baby-Sitters Little Sister) | Level 3-4 | 9-12 | Gentle |
| 86 | Karen's school trip | Level 2-3 | 9-12 | Mild |
Content Intensity Across the Series
VariesContent intensity ranges from Gentle to Moderate across the series.
Series books grow with readers — but that's also the trap. Most series start at one reading level and one content intensity and drift upward over the course of the run. Baby-Sitters Little Sister (86 books by Ann M. Martin) lands at a grades 2–4 reading level, with average content intensity 1.3/5. Intensity varies from book to book, so check individual ratings in the list above.
The reading-order table above lists every book with per-volume reading level, age and intensity ratings so you can spot any escalation before it catches your reader off guard. For a deeper dive into how we score text difficulty vs. emotional weight separately — and why series readers especially benefit from that split — see our methodology page.
All Baby-Sitters Little Sister Books
Karen's witch
Ann M. Martin
Karen's witch
Ann M. Martin
Karen's Little Sister
Ann M. Martin
Karen's Little Sister
Ann M. Martin
Karen's School Picture
Ann M. Martin, Susan Tang
Karen's School Picture
Ann M. Martin, Susan Tang
Karen's haircut
Ann M. Martin
Karen's haircut
Ann M. Martin
Karen's kittycat club
Ann M. Martin
Karen's kittycat club
Ann M. Martin
Karen's prize.
Ann M. Martin
Karen's prize.
Ann M. Martin
Karen's surprise
Ann M. Martin
Karen's surprise
Ann M. Martin
Karen's wish
Ann M. Martin
Karen's wish
Ann M. Martin
Karen's worst day
Ann M. Martin
Karen's worst day
Ann M. Martin
Karen's carnival
Ann M. Martin
Karen's carnival
Ann M. Martin
Karen's goldfish
Ann M. Martin
Karen's goldfish
Ann M. Martin
Karen's good-bye
Ann M. Martin
Karen's good-bye
Ann M. Martin
Karen's home run
Ann M. Martin
Karen's home run
Ann M. Martin
Karen's mystery
Ann M. Martin
Karen's mystery
Ann M. Martin
Karen's Plane Trip
Ann M. Martin
Karen's Plane Trip
Ann M. Martin
Karen's sleepover
Ann M. Martin
Karen's sleepover
Ann M. Martin
Karen's baby
Ann M. Martin
Karen's baby
Ann M. Martin
Karen's big joke
Ann M. Martin
Karen's big joke
Ann M. Martin
Karen's bully
Ann M. Martin
Karen's bully
Ann M. Martin
Karen's kittens
Ann M. Martin
Karen's kittens
Ann M. Martin
Karen's secret
Ann M. Martin
Karen's secret
Ann M. Martin
Karen's tea party
Ann M. Martin
Karen's tea party
Ann M. Martin
Bsls #39
Ann M. Martin
Bsls #39
Ann M. Martin
Karen's Big Lie (Baby-Sitter's Little Sister #38)
Ann M. Martin
Karen's Big Lie (Baby-Sitter's Little Sister #38)
Ann M. Martin
Karen's Campout
Ann M. Martin, Susan Tang
Karen's Campout
Ann M. Martin, Susan Tang
Karen's doll hospital
Ann M. Martin
Karen's doll hospital
Ann M. Martin
Karen's newspaper
Ann M. Martin, Susan Tang
Karen's newspaper
Ann M. Martin, Susan Tang
Karen's pizza party
Ann M. Martin, Susan Tang
Karen's pizza party
Ann M. Martin, Susan Tang
Karen's school
Ann M. Martin, Susan Tang
Karen's school
Ann M. Martin, Susan Tang
Karen's toothache
Ann M. Martin, Susan Tang
Karen's toothache
Ann M. Martin, Susan Tang
Karen's Baby-Sitter
Ann M. Martin
Karen's Baby-Sitter
Ann M. Martin
Karen's big top
Ann M. Martin
Karen's big top
Ann M. Martin
Karen's Candy
Ann M. Martin
Karen's Candy
Ann M. Martin
Karen's Kite
Ann M. Martin
Karen's Kite
Ann M. Martin
Karen's Lucky Penny
Ann M. Martin
Karen's Lucky Penny
Ann M. Martin
Karen's Mermaid
Ann M. Martin
Karen's Mermaid
Ann M. Martin
Karen's School Bus
Ann M. Martin
Karen's School Bus
Ann M. Martin
Karen's stepmother
Ann M. Martin
Karen's stepmother
Ann M. Martin
Karen's Two Families
Ann M. Martin
Karen's Two Families
Ann M. Martin
Karen's Monsters (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Monsters (Baby-Sitters Little Sister)
Ann M. Martin
Karen's new bike
Ann M. Martin
Karen's new bike
Ann M. Martin
Karen's Ski Trip
Ann M. Martin
Karen's Ski Trip
Ann M. Martin
Karen's Tattletale
Ann M. Martin
Karen's Tattletale
Ann M. Martin
Karen's Toys
Ann M. Martin
Karen's Toys
Ann M. Martin
Karen's turkey day
Ann M. Martin
Karen's turkey day
Ann M. Martin
Karen's Big Fight
Ann M. Martin
Karen's Big Fight
Ann M. Martin
Karen's big sister
Ann M. Martin
Karen's big sister
Ann M. Martin
Karen's Christmas tree
Ann M. Martin
Karen's Christmas tree
Ann M. Martin
Karen's County Fair (Baby-Sitters Little Sister)
Ann M. Martin
Karen's County Fair (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Half Birthday (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Half Birthday (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Island Adventure
Ann M. Martin
Karen's Island Adventure
Ann M. Martin
Karen's Magic Garden
Ann M. Martin
Karen's Magic Garden
Ann M. Martin
Karen's Big Job
Ann M. Martin
Karen's Big Job
Ann M. Martin
Karen's Bunny
Ann M. Martin
Karen's Bunny
Ann M. Martin
Karen's New Puppy
Ann M. Martin
Karen's New Puppy
Ann M. Martin
Karen's Pilgrim (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Pilgrim (Baby-Sitters Little Sister)
Ann M. Martin
Karen's pony camp
Ann M. Martin
Karen's pony camp
Ann M. Martin
Karen's unicorn
Ann M. Martin
Karen's unicorn
Ann M. Martin
Bsls #99
Ann M. Martin
Bsls #99
Ann M. Martin
Karen's Big Move (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Big Move (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Black Cat (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Black Cat (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Chain Letter (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Chain Letter (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Fishing Trip (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Fishing Trip (Baby-Sitters Little Sister)
Ann M. Martin
Karen's Promise
Ann M. Martin
Karen's Promise
Ann M. Martin
Karen's Snow Princess
Ann M. Martin
Karen's Snow Princess
Ann M. Martin
Karen's New Holiday (Baby-Sitter's Little Sister #112)
Ann M. Martin, Susan Tang
Karen's New Holiday (Baby-Sitter's Little Sister #112)
Ann M. Martin, Susan Tang
Karen's runaway turkey
Ann M. Martin
Karen's runaway turkey
Ann M. Martin
Karen's Show and Share
Ann M. Martin
Karen's Show and Share
Ann M. Martin
Karen's Spy Mystery
Ann M. Martin
Karen's Spy Mystery
Ann M. Martin
Karen's Swim Meet
Ann M. Martin
Karen's Swim Meet
Ann M. Martin
Karen's cowboy
Ann M. Martin
Karen's cowboy
Ann M. Martin
Karen's Easter parade
Ann M. Martin
Karen's Easter parade
Ann M. Martin
Karen's gift
Ann M. Martin
Karen's gift
Ann M. Martin
Karen's yo-yo
Ann M. Martin
Karen's yo-yo
Ann M. Martin
Karen's birthday
Karen's birthday
Karen's Cartwheel
Karen's Cartwheel
Karen's Ducklings
Karen's Ducklings
Karen's ghost
Karen's ghost
Karen's ice skates
Karen's ice skates
Karen's in Love
Karen's in Love
Karen's lemonade stand
Karen's lemonade stand
Karen's Nanny
Ann M. Martin
Karen's Nanny
Ann M. Martin
Karen's new friend
Ann M. Martin
Karen's new friend
Ann M. Martin
Karen's new teacher
Karen's new teacher
Karen's Paper Route (Baby-Sitters Little Sister)
Ann M. Martin, Susan Tang
Karen's Paper Route (Baby-Sitters Little Sister)
Ann M. Martin, Susan Tang
Karen's school trip
Ann M. Martin
Karen's school trip
Ann M. Martin
Series Like Baby-Sitters Little Sister: What to Read Next
Similar reading level, content intensity and themes.
- Baby-Sitters Club by Ann M. Martin 36 books · Grades 3–5 · gentle to moderate content
- Baby-Sitters Club Mystery by Ann M. Martin 9 books · Grades 3–5 · gentle to mild content
- Graveyard School by Tom B. Stone 27 books · Grades 3–5 · gentle to moderate content
- Littles by John Lawrence Peterson 20 books · Grades 2–5 · gentle to mild content
- Goosebumps Series 2000 by Robert Lawrence Stine 22 books · Grades 2–4 · mild to moderate content
- Tao, the Little Samurai by Laurent Richard 4 books · Grades 2–3 · gentle to mild content
Questions about the Baby-Sitters Little Sister series
- What reading level is the Baby-Sitters Little Sister series?
- Baby-Sitters Little Sister books are at a grades 2–4 reading level (average grade level 3.1), and HootRated recommends the series for ages 9–12. There are 86 books in the series.
- What order should I read the Baby-Sitters Little Sister books?
- Series numbers aren't available for most Baby-Sitters Little Sister books, so HootRated lists them by publication date: Karen's witch (1988); Karen's Little Sister (1989); Karen's School Picture (1989); Karen's haircut (1990); Karen's kittycat club (1990); and 81 more.
- What age is the Baby-Sitters Little Sister series appropriate for?
- HootRated recommends Baby-Sitters Little Sister for ages 9–12. Content is gentle to moderate (HootRated intensity 1–3 out of 5). Intensity varies from book to book, so check individual ratings in the list above.