11 books in series

Isaac Asimov's Magical Worlds of Fantasy

Isaac Asimov's Magical Worlds of Fantasy is a 11-book series with 11 released primary works first released in 1981 with contributions by Isaac Asimov, Martin H. Greenberg, Charles G. Waugh, Arthur Conan Doyle, Edward D. Hoch, Stephen King, Jack Vance, Henry Slesar, Frank R. Stockton, Fritz Leiber, Ray Bradbury, Gerald W. Page, Andre Norton, and Robert Arthur.

Wizards: Isaac Asimov's Magical Worlds of Fantasy 1
Witches: Isaac Asimov's Magical Worlds of Fantasy 2
Cosmic Knights: Isaac Asimov's Magical Worlds of Fantasy 3
Spells
Giants
Mythical Beasts: Isaac Asimov's Magical Worlds of Fantasy, Vol. 6
Magical Wishes
Devils
Atlantis: Isaac Asimov's Magical World's of Fantasy #9
Ghosts
Asimov Fantasies: Curses
Faeries