Gwen Moore Kelaidis is one of the foremost experts on rock gardening in the United States. She is the former co-owner of Rocky Mountain Rare Plants, a mail-order nursery, and for 11 years was the editor of the Bulletin of the American Rock Garden Society.Saxon Holt is a photojournalist who has spent more than 40 years exploring Kingdom Plantae and the fundamental importance of plants to the health of the planet. A lifelong gardener, he abandoned commercial photography when he discovered garden publishers and could no longer stay in a studio. His work has been featured in diverse publications, from Architectural Digest and Pacific Horticulture magazine, to Smithsonian and Money magazines.