This book tells about the life and studies of Dr Jack Schuster in Guatemala. It features stories from Dr Schuster's work and life, as well as information and photographs by José Monzón Sierra on Guatemala's insect biodiversity. The book contains information on the importance and strategies of sex in invertebrates as a central mechanism of evolution, curious information on the diversity of insects in Guatemala and the world, as well as Dr Schuster's career as a member of Alux Nahual and other musical groups. Part of the proceeds from the sale of this book will go to research and protection of biodiversity in Guatemala.