Thrice's boundary pushing continues with the second installment of the "Alchemy Index" series. "Volumes I & II: Fire & Water," released in October 2007, were met with tremendous critical acclaim and fanfare. Fans and critics were especially impressed with the "Water" side and just how far the band had pushed the parameters of what they can do as professional musicians. The "Air & Earth" series show two more sides of the band that anyone has yet to see. The "Air" side will expose a more soft rock side while "Earth" will showcase a more stripped down, raw element of the band.