Exhibition catalogue of artist Tomaz Viana "Toz", (b. Salvador, 1976, lives and works in Rio de Janeiro), best known for his mural urban art. His Bahian origins and the songs, dances, rites and passages of the Afro-Brazilian culture have always influenced his work and particularly in the creation of his last character "Insomnia" in 2010, where he materialized his roots in a mystical creature, entity of lost nights. From then on, Insomnia has been gaining life, history, attributes, accessories and a culture of its own. The exhibition features canvases, installations, intervened photographs, sculptures and mannequins, some of them unpublished, that detail all the curiosities, ties and history of this nocturnal and omnipresent entity. Project "Os Amigos da Gravura" (Friends of Engraving) started by the Museums Castro Maya in 1992, incorporates contemporary Brazilian art to the collections left by its founder, industrialist and entrepreneur Raymundo Otonni de Castro Maya.