These first entries in an ecology-oriented nature series are attractively unimposing in appearance and written with careful attention to clarity and ease in reading. The bug book is essentially a presentation of the case for biological pest control, with a concise and concrete summary of the dangers and counterproductive effects of DDT and other chemicals, a review of natural alternatives (predators, pheromones, sterilization, etc.), and a closer look at a Niles, Michigan, laboratory where parasitic wasps are grown in a successful effort to combat the destructive cereal leaf beetle (and where, not so incidentally, a middle-aged former housewife has established herself in a scientific career). The whale book tells a more familiar story, reporting on whales in general and on the unfortunate history of whaling, but it too introduces some human interest in the persons of a student and a fisherman who are involved in the College of the Atlantic's whale watch, and it devotes more attention than usual to the boycott of Japanese goods which the Grahams state has done more to save whales from whalers than have all the efforts of the older International Whaling Commission. Both books should be welcomed by pupils and teachers engaged in ecology study.