A thorough introduction to the earthworm and its importance. As the author wisely points out, worms are perfect subjects: they're ubiquitous, plentiful, and ""can't possibly hurt you."" Step-by-step instructions for experiments and techniques for recording observations lead into a survey of other facts (including physical characteristics, habitat and mating habits) and the worm's place in the food chain and soil ecology. There are suggestions for devising further experiments, many clear, workmanlike drawings and diagrams, a glossary, a list of books for further reading, and an index. A fine blend of clarity and organization, with information presented in a style and sequence sure to spark curiosity and independent thinking. The book also serves by example as an excellent primer on scientific method.