Have you seen the Lolita Book Purse? Natalie Portman was seen carrying it, very cute and interesting.
(Also, it makes you look smart. haha)
There is, indeed, a video tutorial on a book purse but the outcome of his project disapointed me greatly. If you are interested in watching it, here's the link on Youtube.
I currently cannot find a great tutorial yet, but I suggest to cut out 2 trangular shaped pieces of fabric, like in the video above, for the sides of the purse when it opens. But instead of cuting out all the pages of a book shown in the video, hollow the book out instead, which can be done according to this tutorial. Finally, to attach all the pieces together like Natalie Portman's, I suggest fabric glue. You can also place more fabric to cover the inside of the book, like the Moby Dick novel above.
NOTE: This is not really a tutorial, just my suggestions on how to create the purse. I will re-post if I find a better tutorial for this project,