Though it doesn't cover some aspects in depth, it covers things overlooked by other books. Interesting descriptions and good recomendations: aquarium themes regarding fish and their natural enviroment, aquarium plants characteristics and needs (highly recommended to prevent algae when you place an aquarium near a window), notes on fish "hardness" and temper. Plenty of full color pictures all over the book. It worth the price. I also recommend Community Fish from the same author as a companion reading.