I'm about half way through the first Discovery of Witches... I LOVE it! I've been working on it since the beginning of winter though, so I keep having to go back and restart it. I just never have enough time, it seems like, and (to me) it reads slowly.
I love anything in the Outlander series, and will reread them constantly.
Me too. I always have one on my Kindle as a "backup book" for when I have nothing else to read. I can read a few chapters here and there of any one of them and be totally happy. The only one I won't reread is #2 because Professor Lockhart annoys me.
I reread Harry Potter a lot, especially when I'm feeling too stressed and too adult and just need to escape to a comfortable place for a little bit. Harry Potter for me is like the literary equivalent of sweatpants.
A Prayer for Owen Meany by John Irving (strange, coming from a nonbeliever; but I really just love this book.) I read it about every other year, and have for over 15 years now.
Terry Pratchett's Discworld novels. They're such great stories, and so fun, and there's a lot of wordplay that can be easily missed in the first (several) reads, because the plots are so engaging. I own them all, and have read each at LEAST twice. I've read many more than twice!
When I hit my late 20s, I decided to re-read a lot of classics that I'd been exposed to in high school or early undergrad. I found that my tastes had changed a lot in some ways; and in almost every circumstance, the book spoke to me differently than it had when I was younger. This isn't surprising when I think about it; but it was surprising to experience it.
I was a voracious reader as a child, so most of my "reread" arsenal is from childhood. It happens But it does make me happy to have a Kindle so I feel a little less self-conscious reading in public. I especially enjoy Harry Potter and Mary Poppins (any in the series).
In adult land, though, I have a few non-fiction books I like to read and reread. "All in the Timing" is actually a series of one-act plays, so not actually non-fiction but... yeah. And some books related to spirituality, religion, health, etc.
The Golden Compass trilogy when I need an escape (in addition to Harry Potter), Lamb: The Gospel According to Biff, Christ's Childhood Friend when I want to feel spiritual/humored, and The Bell Jar whenever I feel sad or lonely. They're all like old friends that I need to visit every once in a while.
I reread most of Jane Austen about once a year. And because I'm a Lewis and Clark/Little Bighorn/Indian Wars nerd, I reread Lewis and Clark's journals and Son Of The Morning Star by Evan McConnell for a terrific all-encompassing and witty account of the LBH fight. I can pick either up and randomly pick a page and jump right in. I love them for that!
Two more nonfiction books I enjoy rereading are Under The Banner Of Heaven (Krakauer) and Confederates in the Attic (Horwitz). At least 4X for each.
I have a pretty large library and I reread everything a bunch of times. I do love books I do I do.