Cloak of Aesir is a collection of science fiction stories by American writer John W. Campbell, Jr.

The stories originally appeared in the magazine Astounding SF under Campbell's pseudonym Don A. Stuart.

Six of the seven stories were later included in the 1976 collection The Best of John W. Campbell (Ballantine/Del Rey).

[1] Writing in The New York Times, J. Francis McComas "warmly recommended" Cloak of Aesir, noting that "none of these stories follows its chosen path to an expected destination.

"[3] Boucher and McComas, however, praised Cloak for the stories' "amazing modernity of concept and extrapolation [and their] rarely achieved combination of original thinking and high adventure.".