1. Async JavaScript by Trevor Burnham
This book is very concise and focused on various Async topics in JavaScript. This is probably one of the best JavaScript books I ever read. And it has many pointers and links for the readers to explore and try out by themselves.
He also wrote a CoffeeScript book, definitely should check it out as well.
2. Mining of Massive Datasets by Anand Rajaraman and Jeff Ullman
Just started reading, but from the table of contents, it covers many interesting areas in the data mining with real world applications. And it provides a free version that readers can download.
