Book of Horizons is the fourth studio album by Secret Chiefs 3, released May 25th 2004. Book of Horizons was the first Secret Chiefs 3 album to reveal the satellite bands that form the actual band under their own names. Out of the seven bands only one, NT Fan, was not heard on the album at all. The other six are The Electromagnetic Azoth, UR, Ishraqiyun, Traditionalists, Holy Vehm and FORMS.