The above guys were too nice. Honestly, this book sucked monkeys. The whole book read like the author just took his Powerpoint presentations and cut & pasted them into the book (typos and all). To his credit, the author did seem to know what he's talking about, but his format was just so awkward that he might as well have been speaking French.

This book should not have been published at all. Frankly, it's not worth the money. If you want to learn UML, try reading up on Booch and co.. This book needs to be hacked apart and overhauled by a good editor. Maybe you can condense it to a good desktop reference and sell it for $5.99.