Rating: 

I really don't understand the comments of Michael (posted earlier). This book is really great.

I like studying form good books, not on screen (like those on-line courses), and without a teacher which I am depending on getting 'the picture'. And very important for me, as a not native English speaking person, a book that I can 'read' and 'understand' without searching through a dictionary all the time or trying to understand all kinds of 'weird' expressions.
In my opinion the 'Head First'-series do a great job in achieving learning and understandig 'hard' technical subjects on your own!

***** I can also recommend 'Head First Design Pattern' (I can't explain how thankfull I am that this book is written).