He was a big believer in using books to supplement his history lessons. For instance, he would have us read "Call of The Wild" to learn more about the Gold Rush in Alaska and "Red Badge of Courage" to learn more about the Civil War. He did not want us just memorizing names and dates but also understanding the context of the history he was teaching us.
I doubt either of those books would pass muster in a "politically correct" classroom today - much less an elementary classroom! But those were different times.
When my own children were growing up, Harry Potter books were quite the thing. I encouraged my kids to read them because it got them away from the computer screen for a while. I know a lot here despise the Harry Potter series but it got my children interested in reading on their own so I will always be thankful for that. None of them ever read to the extent that I do but at least they have shelves of books in their own homes and have made reading regularly a part of their lives.
“stacks of paperbacks all over the classroom”
bttt
When I was a kid I went through all the Edgar Rice Burroughs books and lucked into (what was then) a full set of the re-issued Doc Savage books. Tons of science fiction. It’s amazing what you can absorb from fiction.