Multiverse: Exploring Poul Anderson's Worlds

Multiverse: Exploring Poul Anderson's Worlds is a gedenkschrift honoring science fiction and fantasy author Poul Anderson, in the form of an anthology of short stories and tributes edited by Greg Bear and Gardner Dozois. The book also includes cover art and interior illustrations by Bob Eggleton. It was first published in hardcover in May 2014 by Subterranean Press, with simultaneous paperback and ebook editions issued in June 2015 by Baen Books. All but one of the pieces are original to the anthology; the remaining one, Tad Williams's "Three Lilies and Three Leopards (And a Participation Ribbon in Science)", was originally published in the Winter 2012 issue of the ejournal Subterreanean Online.

Most of the works in the book are short stories, novelettes and novellas set in worlds or other settings created by Anderson, some being sequels to stories by him. Nonfiction reminiscences on Anderson by his wife Karen Anderson and daughter Astrid Anderson Bear and friend and fellow writer Jerry Pournelle are also included. An overall introduction by Bear, individual introductions to each story by both editors, and afterwords to each story by the individual authors provide factual information regarding Anderson, the stories, and the impact he had on the authors' lives and work.