Poul Anderson (1926-2001) was born in Pennsylvania of Scandinavian stock. He started publishing science fiction in 1947 and became one the great figures in the genre, serving as President of the Science Fiction Writers of America, winning multiple Hugo and Nebula awards, and was named a SFWA Grand Master. He collaborated regularly with wife, Karen, and their daughter is married to noted SF writer Greg Bear.
Poul Anderson died in July 2001.
Karen Kruse Anderson was the widow and sometime co-author of Poul Anderson, and mother-in-law of writer Greg Bear.
She wrote the first published science fiction haiku (or scifaiku), "Six Haiku" in The Magazine of Fantasy & Science Fiction, in July 1962, and is one of the founders of the Society for Creative Anachronism. She was invested as a member of the Baker Street Irregulars, and was active both in Sherlockian groups and in the Los Angeles Science-Fantasy Society.
She died in 2018, aged 85.