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Primary Source Readers: Expanding...the Union Books in Order

Primary Source Readers: Expanding...the Union is a 6-book series by Jill K Mulhall for ages 5–12, at a grades 4–5 reading level, with gentle to moderate content (HootRated intensity 1–3 out of 5).

Books
6
By publication date
Reading level
Grades 4–5
Average grade level 4.4
Recommended ages
Ages 5–12
From HootRated age ratings
Content intensity
Gentle to moderate
HootRated 1–3 out of 5 · avg 1.3

Primary Source Readers: Expanding...the Union Reading Order

Series numbers aren't available for most Primary Source Readers: Expanding...the Union books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Civil War Is Coming
2005 · Christi E. Parker
Level 5-6 9-12 Moderate
2 Expanding the Nation
2005
Level 4-5 5-8 Gentle
3 James Madison
2005
Level 4 5-8 Gentle
4 Laura Ingalls Wilder
2005 · Christi E. Parker
Level 4-5 5-8 Gentle
5 Lewis and Clark
2005
Level 4-5 5-8 Gentle
6 War of 1812
2005
Level 4-5 5-8 Gentle

Content Intensity Across the Series

Varies

Content intensity ranges from Gentle to Moderate across the series.

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2
3
4
5
6
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. Primary Source Readers: Expanding...the Union (6 books by Jill K Mulhall) lands at a grades 4–5 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.

Similar reading level, content intensity and themes.

Questions about the Primary Source Readers: Expanding...the Union series

What reading level is the Primary Source Readers: Expanding...the Union series?
Primary Source Readers: Expanding...the Union books are at a grades 4–5 reading level (average grade level 4.4), and HootRated recommends the series for ages 5–12. There are 6 books in the series.
What order should I read the Primary Source Readers: Expanding...the Union books?
Series numbers aren't available for most Primary Source Readers: Expanding...the Union books, so HootRated lists them by publication date: Civil War Is Coming (2005); Expanding the Nation (2005); James Madison (2005); Laura Ingalls Wilder (2005); Lewis and Clark (2005); and 1 more.
What age is the Primary Source Readers: Expanding...the Union series appropriate for?
HootRated recommends Primary Source Readers: Expanding...the Union for ages 5–12. 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.