Not history books, but here is a list of books we use for those learning to read. (appx 1st/2nd grade)
Early Readers (level 1)The Adventures of Little Bear / Little Bear Treasury
Frog & Toad Treasury / Days with Frog & Toad
any Biscuit books (lots of them or there are a couple of Treasuries)
Owl at Home
Mouse Soup
Grasshopper on the Road
Mouse Tales
Uncle Elephant
Early Readers (level 2)National Geographic Kids (sharks, volcanoes, trucks, polar bears, etc, etc)
Frances books (Bread & Jam for Frances, A Bargain for Frances, A Baby Sister for Frances, etc)
Amelia Bedelia (the older ones, not the new ones)
McBroom's Wonderful One-Acre Farm
Mercy Watson books
The Bravest Dog: Balto
Marley books
Fancy Nancy (the early ones are alright, but don't move into the chapter books)
The Golly Sisters Go West
I'm pretty sure places like TAN books sell leveled readers that were originally written for Catholic schools, but I don't own any of those, so I don't know if they're worth the cost or not. Most of the books I've listed here we've collected from yard sales or are otherwise inexpensive.
Once they're ready for chapter books, I like the Imagination Station series.
These are some of the religious picture books (read-alouds) that we have.The Weight of a Mass
Take it to the Queen
Treasure Box books (20 in all)
Clown of God
The End of the Fiery Sword (two others in this series)
St. Patrick by dePaola
Brigid's Cloak
Legend of the Poinsettia
Manners in God's House
The Legend of St. Christopher
Here's the Columbus book we have:
https://www.amazon.com/gp/product/068413179X/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=068413179X&linkCode=as2&tag=httpwwwchanco-20 />
I doubt it's in print, but you might find a copy somewhere.