I generally have several books going at the same time. If the book is absorbing I will finish it really quickly, for a paperback maybe 2-3 hours. I don't know if it's a talent or not but I will become so absorbed in a book that I completely zone out everything else going on.

If I like the book I will read it again.

And all the above applies to fiction. I read a lot of non-fiction. With that I will take notes, underline, re-read passages.