The site for Marisha Pessl’s Special Topics in Calamity Physics (Viking) is one of the neatest book promo sites out there. In fact, it seems to be a part of the “book companion” site trend. I haven’t read the book, but the site seems to “flesh out” a good bit.
There’s a new online tool for tracking down authors similar to those near and dear to your heart. Just type in your fave scribe into the The Literature Map and it will form a breathing author cloud around that person. By measuring proximity, you can judge who this program things you’ll enjoy most.