My solution to this? Amazon Book Search by Book Cover Image
Here's how it works: you start to doodle a rough version on the book, and Amazon returns with all the book covers that mildly resemble your sketch.
Something similar was created for Flickr in 2006 called Retrievr. Check it out:
Success-ish!
Amazon has a bajillion book cover images in its system thanks to the ability for customers to add their own covers in addition to its own collection. In fact, Amazon's constantly innovative search and referral methods has influenced their overwhelming success.
If Retrivr could do it in 2006, Amazon can do it now. And perhaps better, especially as image search technology improves (as evidenced by Google's new project called Similar Image Search, which is super rad).
