Richard Spellenberg, a botanist and specialist in plant taxonomy, is the author of the National Audubon Society Field Guide to Wildflowers, Western Region. Christopher J. Earle is an ecologist whose specialties include forest ecology and conifer biology. Gil Nelson is a botanist and the coauthor of the National Wildlife Federation Field Guide to Trees of North America and the National Audubon Society Field Guide to the Southeastern States. David More is regarded as one of the finest botanical illustrators in the world. He has illustrated a number of tree guides, including the acclaimed Collins Tree Guide and The Illustrated Encyclopedia of Trees (Princeton).

"A splendid book, comprehensive in a way that readily answers the questions I bring home from the field."---Paul J. Willis, Books and Culture --- "This guide is great for identifying trees throughout western Canada and the United States, particularly for botanists on the move."---Kimberly Gould, Alberta Native Plant Council Newsletter --- "For that subset of plant aficionados interested in the more arboreal members of our flora, this book should fill that bill. I have come away with a whole new set of what will probably be marginal plants to search out and try."---Jim Borland, Aquilegia --- "Everyone who ventures into the outdoors should have a copy in their backpack."---Frank Sousa, MassLive --- "With the publication of Trees of Western North America and its companion volume, Trees of Eastern North America, we have a reference set that will serve us well for generations." --- "Whether you're faced with a saguaro or a sequoia, a hawthorn or a hemlock, this easy guide will surely get you to the birch in time."---Matthew Bettelheim, (bio)accumulation blog --- "Without a doubt, this is a book that should be on the library shelf of every person interested in Georgia trees. Even better, it should be in all of our packs, right next to the hiking stick, ready to go!"---Hal Massie, BotSoc News --- "Even if you don't love trees, you'll love these books."---Devorah Bennu, GrrlScientist --- "Astonishing. . . . The illustrations in the Princeton tree volume are superb: colorful, accurate, and appealing."---Ed Kanze, Adirondack Explorer --- "These volumes are masterfully designed, and More's exquisitely detailed renderings will ensure that weekend botanists never mistake their Hercules' club for a common hoptree."---Bill Cannon, Scientist's Bookshelf --- "These new references offer up-to-date information as well as a treasure trove of specially commissioned drawings showcasing trees both in their majestic entirety as well as in stunning, separate close-ups detailing their bark, leaves, flowers, and fruit. Such comprehensive works are impressive scholarly achievements, providing lay users with helpful assistance via 'Quick ID' summaries and range maps within entries. These are lush botanical resources from an esteemed source guaranteed to please all audiences."---Judy Quinn, Library Journal --- "The book is attractively designed, and each species description provides scientific and common names; a handy 'Quick ID' sentence; detailed, terse physical description; sections titled 'Habitat/Range' and 'Similar Species'; and a range map. . . . [An] excellent reference." --- "Excellent additions to any botanical library."---Steve Whysall, Vancouver Sun --- "Highly recommended for botany reference shelves!"---James A. Cox, Midwest Book Review --- "Each volume on its own would serve you well in getting to know the trees around you better. Both together certainly provide a more complete understanding of the diversity of North American trees. I already treasure my two-volume set and expect to wear it out quickly."---Guy Sternberg, American Gardener --- "Covering more species (630 in the West, 825 in the East) than any comparable field guides, Trees of Western North America and Trees of Eastern North America are the most comprehensive, best illustrated, and easiest-to-use books of their kind. The book features thousands of meticulous color paintings by David More and easy-to-read descriptions present details of size, shape, growth habit, bark, leaves, flowers, fruit, habitat, and range. With an unmatched combination of breadth and depth, these are essential guides for every tree lover."---James A. Baggett, Better Homes and Gardens