This book is the first account to cover the closely related genera Cotyledon and Tylecodon. It represents information gathered over 25 years. Each species is described and illustrated by means of exquisite watercolour paintings by Elise Bodley and Lisa Strachan as well as habitat photographs of the plants. Distribution maps of all species are included. The book covers the plants' adaptation to arid environments, their distribution in Africa, cultivation and ethnic uses, a historical review of botanical exploration and keys to simplify identification.