When I read a book, I highlight passages that I think I might want to find quickly later on. I also jot down notes and cross-references in the margins, most of which would not make any sense to anyone other than myself. On top of that, if there are longer passages I want to remember, I note those along with appropriate page numbers on the first blank page. And yes, I slap a bookplate on my books as well, usually inside the front cover. (All of these practices drive my wife up the wall. She has sometimes resorted buying her own copy of books she wants to read so that she won’t have to see my vandalism.)
I do this more now than I used to. For most of my life, I read books as isolated experiences unless they happened to be for a class at school which required me to think of them in relation to one another. Over the past few years, as I have accumulated more memories and—I hope—a greater store of knowledge, my reading habits have subtly changed. The more I read, and the more I think about what I read, the more I notice connections between books, across genres, and in relation to life in general. Deliberately looking for ways to bring books out of their silos has made reading more meaningful to me.
Which brings us to the question of how many books to keep on hand. Some housekeeping experts say that once a book has been read, it should leave the house. (“Does it spark joy?”) Over the years, I have donated, sold, or given away dozens, if not hundreds, of books. I wish I had most of them back. I have bought, purged, then rebought the same book multiple times. I long for the day when I can afford a big enough place to have an organized home library. If I read a book that I know I’ll never read again, whether it’s because I didn’t like it or because it was just plain bad, I’m okay with letting that one go. Otherwise, I do return to books. They are friends I like to keep close.