Primary Source Readers: Expanding...the Union Books in Order
6 books by Jill K Mulhall. Reading level: Grades 4–5.1. Lower Grades (Ages 5–8).
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 reading level Grades 4–5.1, with average content intensity 1.3/5.
The reading-order table below lists every book with per-volume reading level and intensity badges 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.
Content Intensity Across the Series
VariesContent intensity ranges from Gentle to Moderate across the series.
Primary Source Readers: Expanding...the Union Reading Order
| # | Title | Reading Level | Content |
|---|---|---|---|
| 1 | Civil War Is Coming Christi E. Parker | Level 5-6 | Moderate |
| 2 | Expanding the Nation Jill K Mulhall | Level 4-5 | Gentle |
| 3 | James Madison Jill K Mulhall | Level 4 | Gentle |
| 4 | Laura Ingalls Wilder Christi E. Parker | Level 4-5 | Gentle |
| 5 | Lewis and Clark Jill K Mulhall | Level 4-5 | Gentle |
| 6 | War of 1812 Jill K Mulhall | Level 4-5 | Gentle |
All Primary Source Readers: Expanding...the Union Books
Civil War Is Coming
Christi E. Parker
Civil War Is Coming
Christi E. Parker
Expanding the Nation
Jill K Mulhall
Expanding the Nation
Jill K Mulhall
James Madison
Jill K Mulhall
James Madison
Jill K Mulhall
Laura Ingalls Wilder
Christi E. Parker
Laura Ingalls Wilder
Christi E. Parker
Lewis and Clark
Jill K Mulhall
Lewis and Clark
Jill K Mulhall
War of 1812
Jill K Mulhall
War of 1812
Jill K Mulhall
Questions about the Primary Source Readers: Expanding...the Union series
- What reading level is the Primary Source Readers: Expanding...the Union series?
- The Primary Source Readers: Expanding...the Union series by Jill K Mulhall is at a Grades 4–5.1 reading level (average Grade 4.4). Intended for Lower Grades (Ages 5–8). There are 6 books in the series.
- What order should I read the Primary Source Readers: Expanding...the Union books?
- The reading-order table above lists all 6 books with per-volume reading level and intensity ratings. Start with book 1 and read in publication order unless the table indicates a different recommended order for newer readers.
- What age is the Primary Source Readers: Expanding...the Union series appropriate for?
- The Primary Source Readers: Expanding...the Union series is recommended for Lower Grades (Ages 5–8). The average content intensity is 1.3/5. Check the intensity trajectory above to see whether content gets heavier across the series — if it does, sensitive readers may want to stop earlier in the run.