Back in the 90s, on a computer BBS (dial-up), someone suggested opening a text file, called it BOOKSnn (with nn being the year) and just add to it after you read a book.
I did that for a while, then I started keeping a tiny notebook, because I found I didn’t remember a lot about some of the books I was reading. Didn’t help that many weren’t great books. I was getting them from thrift stores and closeouts and such for 49 cents. Of course they weren’t bestsellers or classics.
I’ve read a lot of history books, biographies\auto-biographies, historical fiction, alternate/counterfactual history, science fiction, military related fiction, fantasy, and religion/theology.