One of the things I've always really liked about Robert Sedgewick's algorithms books is the abundance of useful diagrams showing the various algorithms in actio

One of the things I've always really liked about Robert Sedgewick's algorithms books is the abundance of useful diagrams showing the various algorithms in action. It turns out that he actually took the book's example code, and stuck in a bunch of printf statements to spit out PostScript code describing the current state of the data, and combined this with visualization code that was also written in PostScript to produce the pictures. The end result is a book that's worth buying even if all you do is look at the pictures.