Books are awesome and somewhat under-appreciated piece of knowledge today. Many people prefer to lurk around blogs, documentation, tutorials for some technology, but I always trying to find a book from some reputable author. It does not always exist, but often it does exists and it's much better way to learn a technology. It might take a bit more time, because usually books present information in a more thorough way so you need to work from basics rather than copy-pasting some code and call it a day. But in the end it's worth time spent.