First of all, I would just like to say that I’m not sure that not being able to put a book down is necessarily a mark of quality. I read The Da Vinci Code really quickly because I wanted to find out what happened but afterwards it felt a little unsatisfying – like snacking rather than having a proper meal. Sometimes books that are a little more difficult to deal with or slower to start are often ultimately more satisfying.
I find when I read detective fiction, they are always quite difficult to put down as there is always a mystery to be solved. Most recently, I read Come Unto These Yellow Sands by Josh Lanyon and read it really quickly. There was real depth to this book and I will certainly be reading more by that author. Currently I am reading The Moonstone and that is quite hard to put down and I am certainly curious about what will happen.
I agree that sometimes with mysteries it’s hard to put them down because you want to see what happens next . I haven’t had many unputdownable books although James Patterson seems to think his books are unputdownable, lol.