"Harvard Book Store and Mass Audubon are pleased to welcome naturalist and bestselling author David Sibley, and Christopher Leahy, Gerard A. Bertrand Chair of Natural History and Field Ornithology at Mass Audubon, for a discussion of the second edition of The Sibley Guide to Birds. The publication of The Sibley Guide to Birds in 2000 quickly established David Allen Sibley as the author and illustrator of the nation's supreme and most comprehensive guide to birds. Used by millions of birders from novices to the most expert, The Sibley Guide became the standard by which natural history guides are measured."