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Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) Books in Order

Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) is a 3-book series by Linda D. Williams for ages 5–8, at a grades 3–4 reading level, with gentle content (HootRated intensity 1/5).

Books
3
By publication date
Reading level
Grades 3–4
Average grade level 3.7
Recommended ages
Ages 5–8
From HootRated age ratings
Content intensity
Gentle
HootRated 1/5

Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) Reading Order

Series numbers aren't available for most Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Máquinas niveladoras
Bulldozers / by Linda D. Williams.
2006
Level 3-4 5-8 Gentle
2 Patrullas de policía
2006 · Carol K. Lindeen
Level 3-4 5-8 Gentle
3 Removedoras de tierra
Earthmovers
2006
Level 3-4 5-8 Gentle

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
First book Latest book

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. Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) (3 books by Linda D. Williams) lands at a grades 3–4 reading level, with average content intensity 1/5. Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.

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 Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) Books

Máquinas niveladoras

Linda D. Williams

Cover of Máquinas niveladoras

Máquinas niveladoras

Linda D. Williams

Level 3-4

Patrullas de policía

Carol K. Lindeen

Cover of Patrullas de policía

Patrullas de policía

Carol K. Lindeen

Level 3-4

Removedoras de tierra

Linda D. Williams

Cover of Removedoras de tierra

Removedoras de tierra

Linda D. Williams

Level 3-4

Similar reading level, content intensity and themes.

Enjoy This Series in Other Languages

3 editions available in other languages.

es Spanish (3)

Máquinas niveladoras

Linda D. Williams

Cover of Máquinas niveladoras

Máquinas niveladoras

Linda D. Williams

Level 3-4

Patrullas de policía

Carol K. Lindeen

Cover of Patrullas de policía

Patrullas de policía

Carol K. Lindeen

Level 3-4

Removedoras de tierra

Linda D. Williams

Cover of Removedoras de tierra

Removedoras de tierra

Linda D. Williams

Level 3-4

Questions about the Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) series

What reading level is the Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) series?
Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) books are at a grades 3–4 reading level (average grade level 3.7), and HootRated recommends the series for ages 5–8. There are 3 books in the series.
What order should I read the Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) books?
Series numbers aren't available for most Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) books, so HootRated lists them by publication date: Máquinas niveladoras (2006); Patrullas de policía (2006); Removedoras de tierra (2006).
What age is the Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) series appropriate for?
HootRated recommends Pebble Plus; Máquinas maravillosas; Mighty Machines (Capstone) for ages 5–8. Content is gentle (HootRated intensity 1/5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.