Doona is a 7-book series with 7 released primary works first released in 1969 with contributions by Anne McCaffrey, Jody Lynn Nye, C. J. Cherryh, Arthur C. Clarke, David Drake, Robert A. Heinlein, M.J. Engh, A.E. van Vogt, P.J. Beese, Cordwainer Smith and 9 others.