Not including short story collections, poetry collections, anthologies, etc.
For me, I believe it’s Oroonoko by Aphra Behn because it was on the syllabus for three different classes that I took in college. Other than that, the most I’ve read a single book is twice, and that was Telegraph Avenue by Michael Chabon. I’ve read Dracula 1.5 times. Didn’t finish it the second time around.
Intensity by Dean Koontz, when I was a kid, the outsiders by SE Hinton, and I’ve reread the book Son of a Grifter by Kent Walker quite a few times.
White Oleander
I think it’s The Perks of Being a Wallflower at maybe 6 reads? So nostalgic and always worth revisiting. Not to mention, it’s very easy to read, so that helps.
Demian by Herman Hesse. Although it’s not as impactful to me as the first time I read it, I enjoy the new interpretations I have with each read. I would find phrases that never struck me before but do when I read them. I pick it up almost yearly, and the annotations I left are sort of a great marker of where my head was at and see how my perspective changed.
I have to say terribly Twilight 13 times, i reread it every time there was a new book coming out and i was kind of obsessed with the book as a preteen. My paperback copy literally fell apart one day.
For adult me Outlander i have at least 6 reads of since my first read at like 16. I only got through book 5 and every time i want to read more of the series i start totally over and never end up getting past 5.
It’s Kind of a Funny Story by Ned Vinzinni. sad to say it didn’t age that well but i’ve read it five times
I have read the Percy Jackson series atleast 5 times. Throne of Glass twice.
“The Hunger Games” and “All Quiet on The Western Front”
Catcher in the Rye. 4 times, 4 different books, 4 different decades. Have yet to read it , now 53, in this decade of life. First time at 16ish, again in my 20s, 30s & 40s.
It would have been a Thomas the tank engine book that I used to read a lot when I was little. Now that I have so many books that I haven’t read yet, I hardly ever read a book more than once