Eio Books is an American-based small press publishing house founded in 2004 in the city of Brattleboro, Vermont. In 2011, it opened a second office in Ross, California. Begun by Sydney Longfellow and Ki Longfellow, it is primarily known for the 2005 publication of Longfellow’s novel, The Secret Magdalene, an exploration of the mystery of gnosis told through an interpretation of the life of Mary Magdalene.Eio Books established itself through the success of its first publication.