It covers a wide range of patterns summarized in easy-to-understand language, with code examples. I'm going to enjoy reading through it all.

I also liked the examples of each design pattern found in "everyday situations" - a tea stall making batches of tea for the "flyweight" pattern, etc.

There seems to be an effort to put it up as a website, and to include other languages. Please let us know when there's more progress on it!