Some more come back to mind.
I'd go to my great-aunt's house in Southern Illinois, and she had a series of "Jerry Todd" books with humorous titles. Jerry Todd and the Bob-Tailed Elephant." They were for teenagers, I guess. Teenagers of the 1920s. There was a spinoff character, Poppy Ott, and a book entitled Poppy Ott and the Galloping Snail. They were fun-enough books, but one of them came with a side story by the author (Leo Edwards) that was weird, and I mean kinda creepy-weird, although maybe less so for its time.
She also had a little jewel, The Classics in Slang, in which a low-grade pugilist in the 1920s, I think, was trying to impress his objet d'affection, who owned a book store. She'd give him Shakespeare to read, and then he would summarize them in the Prohibition slang of the time. (Ever hear of "gat"? Or "flivver"?) Quite entertaining.
My parents had a bunch of books for all ages. Voracious readers. My dad had a start of a Tom Slade, Boy Scout series that was pretty darn good. He also liked science fiction, and because my attention span wasn't fully developed (never has been), I gravitated to the short stories of Robert Sheckley, which I still think are brilliant.
It also included a "Chip Hilton" series by Clair Bee. It was youth in sports. I enjoyed the football-based ones the most, the baseball-themed ones okay, and I don't remember a blessed one of the basketball-themed ones.
Little Lord Fauntleroy. It was cute.
And I'd be remiss in not mentioning the Tarzan series which I did start reading at a fairly young age. I read them endlessly. It wasn't until I'd left them alone for a while and back to them later that I realized what an ardent racist Edgar Rice Burroughs was and the sadistic serial killer that he made out of his main character in the first couple of books. I'm frankly glad that society has sanitized that one.