This book as well as answering the titular question about the soil's best friend* (and one of Darwins' pet topics), this fact filled journey through the world of gardens and gardening is packed with Q & A's that are sometimes practical, sometimes whimsical and always intriguing.
Complete with engravings, diagrams, photographs and feature boxes, this book is an absorbing guide to the lesser known aspects of gardening.
Author Guy Barter is an expert horticulturalist and head of the RHS advisory service.
Each of the 216 pages are beautifully illustrated.
*Answer: worms work bloody hard :)