The Elfish Gene: Dungeons, Dragons and Growing Up Strange, by novelist Mark Barrowcliffe; a memoir of playing Dungeons & Dragons and other role playing games in the 1970s [REF].
Author Shelly Mazzanoble wrote a humorous self-help guide called Everything I Need to Know I Learned from Dungeons & Dragons: One Woman's Quest to Trade Self-help for Elf-help.