I was looking for a job because I am graduating this summer, and after I had some interviews, I realized that I need to learn some programming like c/c++, data structures and algorithms, socket programming and multi-threading programming. I like hackerbooks.com but found that the database is quite limited there. So I spent around two weeks to set up the website.
The idea is to use the amazon tagging to connect books. it seems to be a very light-weight app, :D