Kathy Sierra is a real super author. The SCJP 5 book, is a very interesting book for people who want to know about everything (almost) about the java language, every little detail is mentioned here. I think it's a must read book for java programmers.

The book is also a very good preparation for the SCJP exam. Here's a link for the book in goodreads :

Also, for people who wants to read it on computer, here's a link and don't forget to follow the blog :)