This is story about a person with no long-term memory, that doesn't jump around in time(follows a linear progression). Definitely some cheating on that will occur in these types of books and it did here. As a reader you have to take a few things very uncritically like the notebook just as a way to get through the story. Basically, you have to agree that the narrator who has no memory will have memories in order to tell the story that stretch further. You read this a lot, "I just read my notebook...". Then narrator processes all the incredibly traumatic info in the notebook very quickly each day and goes forward, like they have a hard copy of their long-term memories and didn't lose their memory in the first place. That kind of defeats the purpose of having a book based on a narrator who doesn't have a long-term memory. Besides that, it's intriguing enough. If you've seen Memento before, it does seem like a bit of a rehash though.