UFO

UFO is a 6-book series with 6 primary works first released in 1970 with contributions by Alex Shvartsman, Scott Almes, Sergei Lukyanenko, Lavie Tidhar, Jennifer Pelland, Chuck Rothman, Stephanie Burgis, Leah Cypess, James Beamon, Jake Kerr, Zach Shephard, K.G. Jewel, Michael Kurland, Stephen D. Rogers, Marko Kloos, Jeff Stehman, Don Sakers, Bruce Golden, Jamie Lackey, Ferrett Steinmetz, Anatoly Belilovsky, Siobhan Gallagher, Matt Mikalatos, David Sklar, Jody Lynn Nye, Mike Resnick, Dixon Leavitt, Mike Jacobsen, Phil Selby, Charity Tahmaseb, Deborah Walker, Nathaniel Lee, Ken Liu, Robert Silverberg, Esther Frisner, Jim C. Hines, Tim Pratt, Piers Anthony, Karen Haber, Gini Koch, Kevin J. Anderson, David Gerrold, Esther M. Friesner, Bill Ferris, James Wesley Rogers, Laura Resnick, Shaenon K. Garrity, Caroline M. Yoachim, Nathan Hillstrom, Mitchell Shanklin, Daniel J. Davis, Paul R. Hardy, Shane Halbach, Fred Stesney, Cat Rambo, Sarah Pinsker, Lawrence M. Schoen, and Shaenon Garrity.