This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Well, since Henry Wong seems too modest to recommend his own book, Java Threads (from O'Reilly), I'll do it for him. I think he has a great outline. The matter is presented in a very organized way, and new topics are covered where they should be covered. If you want a good all-around Java book, a somewhat shorter introduction can be found in core Java (volume 2 - Advanced Features) from Horstmann and Cornell which also covers a diverse assortment of other topics including Remote Objects, Security, JDBC, and advanced Swing and AWT.