How much would you pay for a 600 page book about NetBeans IDE? Well, it is available for free, constituting all the help pages in NetBeans IDE, organized in helpful categories and downloadable here:
It is also available as an HTML document, here:
As you'll see, it very thoroughly covers everything that NetBeans can do for you!
The book is a testament to the great work done in the NetBeans team by technical writer Ken Ganfield, who not only wrote a lot of it, but also combined it together into the above great and helpful documents. Thanks, Ken!