Melanie Choukas-Bradley is an author, naturalist, and teacher, based in Washington, DC. A long-time contributor to the Washington Post and other publications, she is the author of City of Trees: The Complete Field Guide to the Trees of Washington, DC, third edition, illustrated by Polly Alexander, An Illustrated Guide to Eastern Woodland Wildflowers and Trees, illustrated by Tina Thieme Brown, and Sugarloaf: The Mountain's History, Geology, and Natural Lore, illustrated by Tina Thieme Brown (all Virginia). She currently resides in Chevy Chase, Maryland. Susan Austin Roth is a photographer, writer, and editor who specializes in gardening, landscape design, and all things natural. She has worked as a field editor and assignment photographer for Better Homes and Gardens Magazine, and has received three awards for her photography and writing from the Garden Writers Association. She is the author of ten best-selling gardening books, and her images of gardens and of nature appear regularly in national magazines, books, and calendars. She currently resides in Arlington, Virginia.