The shelves at Gloss were suspended by simple "L" brackets (not seen above), and I was able to find a DIY tutorial for a similar project on Real Simple. The only modifications that I would make would be to glue a few of the pages to the top cover so that the book can be oriented forward and open. I would also replace the top "L" with a flush mount anchor affixed to the top cover of the book and the wall.
Let me know if you decide to give this a try and how it works out!
(Image: Kim Lucian)