Warm Worlds and Otherwise

Blurb

Warm Worlds and Otherwise is a short story collection by Alice Sheldon that, under her pen name James Tiptree, Jr., was first published in 1975. In its introduction, "Who is Tiptree, What is He?", fellow science fiction author Robert Silverberg wrote that he found the theory that Tiptree was female "absurd", and that the author of these stories could only be a man. When it was later revealed that Tiptree was a woman, a postscript to the introduction by Silverberg was added to the collection.
Twelve furiously imaginative, occasionally explosive SF stories, the best of which are quite brilliant