Oh I know that feel. I used to have a stack of books like that by my bed; I eventually decided to move the ones that I'd been stalled out on for a REALLY long time back to my bookshelf to be considered "unread" since I would have to restart from the beginning anyways.

Good luck on your effort to make your way through the pile!

(oh also I just remembered a fifth book I'm stalled out partway through - a nonfiction book that's REALLY GOOD but really dense and requires me to be mentally functional and attentive to make it through even a few pages.)