This was the first reference book in many years to provide an in-depth guide to identifying the many species of sedums. The author provides details regarding 400-plus different kinds of sedums, with photos and identifying characteristics, native habitat, horticulture, etc. The book provides some general information on growing sedums (temperature, water, light, pests, propogation), but the bulk of the book is devoted to a discussion of individual types. With its in-depth, scientific treatment of the subject, it is not necessarily a book for a beginning rock gardener, but anyone past the initial stages of growing sedums would find it useful, and it is a must-have for a nursery owner.