For me, currently, it is Cleopatra and Frankenstein by Coco Mellors. There is a lot of hate about this book. I don’t know why, the book for me is awesome. First few pages and I’m already hooked. Some chapters got me guessing on the relevance of it in the story but it all made sense at the end. Though it’s a debut novel by Mellors and some writing needs to be improved. Looking forward for her future books.
Depends what you’re looking for. The best page turner I ever read in my life was The Shadow of the Wind by Zafon. It’s just a fun mysterious adventure, that’s it really. The book that had a profound effect on my personal perspective ? The Old Man and the Sea. The book that amazed me the most, my favorite book of all, all that jazz? Count of Monte Cristo (I can choose both tomes as a single book right?)