Joel Greenberg's FEATHERED RIVER ACROSS THE HEAVENS to Walker & Company

Joel Greenberg tackles the disappearance of the passenger pigeon in his new book, A Feathered River Across the Heavens, which Walker & Company's Jacqueline Johnson bought world rights to at auction. Greenberg, an avid birder and research associate at Chicago's Field Museum, examines how the passenger pigeon, once the most common bird on the planet, became extinct after decades of being hunted. Wendy Strothman brokered the deal, and Walker is planning a September 2014 publication.