Annual World's Best SF

Annual World's Best SF is a 7-book series with 7 released primary works first released in 1973 with contributions by George R.R. Martin, Lisa Tuttle, Brian M. Stableford, John Brunner, P.J. Plauger, Richard Cowper, Stephen Robinett, Joan D. Vinge, Vernor Vinge, Barrington J. Bayley, and Fritz Leiber.