The brainchild of Mr. Bungle guitarist Trey Spruance, genre-annihilating mega-group Secret Chiefs 3 has announced its two-part Book of Souls, to be released as Folio A in May and Folio B in September. The albums, more than a decade in the making, are the official sequel to Book of Horizons (2004) and are the second in a trilogy. The Chiefs will support each release with US tours in May and October; the first features two-night residencies in select cities. See the dates here.