The author uses lovely illustrations and a dry sense of humour to convey helpful information about the process of creating your own logos and fonts. The book is roughly divided into those two sections, with the former on logos containing a variety of types of logos -- perfect as a resource of ideas.
The section on fonts was less helpful to me, only because it goes into a very fine level of detail about the exact angles, widths, lengths and so on of each letter in a given font. As I'm not particularly interested in designing fonts for anything other than specific website projects, I don't need the level of expertise he clearly has.
Overall, well worth buying if you're a web or graphic designer.