*[Coyote's Guide to Traditional IDL Graphics](http://www.idlcoyote.com/books/index.php): Using Familiar Tools Creatively* by David Fanning is a great resource for users of direct graphics, particularly those using David's fantastic Coyote Graphics system. It contains discussion and many examples of various types of graphics: line plots, contour plots, surface plots, image display (and even image processing), as well as topics such as PostScript output, raster output, and using the Z-buffer.
The book also serves as a user manual for the Coyote Graphics system with most of the examples using the "cg" routines and a chapter on Coyote Graphics extra features like resizeable graphics windows, loading command lists, saving/restoring visualizations, and layout management.
The book itself is 460 high quality, full color pages, available in softcover or as a PDF.
The [book website](http://www.idlcoyote.com/books/index.php) has ordering information, table of contents, sample chapter download (contour plots), and the required files.
*The book is currently on sale through June 6, 2011. After that, it will be available only through Amazon or special order until late July.*