A very engaging mix of various styles of music that keeps the album interesting from start to finish. From the east Indian flair of "The 4", to the punishing grindcore-death metal of "Exterminating Angel" and "Hypostasis of the Archons", to the weird surf-rock on "upon the wings of the haoma" and the absolutely bizzaire Russian chants in "Welcome to the Theatron", it's incredibly difficult to find yourself bored of all the turns in directions this album takes. The album's strength is also its weakness as it tends to lack cohesion and direction, but this is a pretty fun listen for anyone who is a fan of slightly more experimental music.
Book of Horizons is a dizzying, miserable album which is of extraordinarily high value. Trey Spruance put together six satellite bands (there actually exist seven of them) who manage to give it their all effortlessly, and the 14 tracks displayed throughout couldn't sound any better. The record's capability of pushing genre boundaries will render the most self-conscious of listeners speechless, with Spruance's nifty production skills only augmenting both the expected and the unpredictable. This Secret Chiefs 3 release can even occasionally make its lack of coherency one of its biggest strengths, though some out there will say otherwise.
This album only falls short of a 4.5 or 5 star rating due to the weak metal elements that only serve to detract from the brilliance of the progressive majority. I personally never cared much for Mr. Bungle or any other project dominated by Patton, and that influence is what ultimately ruins the ADD, frantic tracks (ie the metal tracks) for me.