Nightwings is a fix-up novel that is comprised of three novellas, most notably the 1969 Hugo Award-winning, and Nebula finalist: "Nightwings". The 2001 iBooks version reviewed here contains slightly modified versions made by the author. It also includes a very interesting foreword detailing the history of the book's creation, including an amusing title tug-of-war with then-editor of Galaxy magazine, Frederik Pohl.