This is partly about keeping goldies and partly about admiring them. It focuses on the considerable charms of the basic, ordinary Goldfish like the London Shubunkin as well as the fancier types like the Tosakin. The only real flaw in the work is that it does not warn you about how much dirtier Goldfish are, and what is different about their upkeep compared to tropical fish.
The pictures of the fish are fun to look through, and the information about the history of the fish is intersting. The other information isn't as useful though.