The Grateful Dead are the latest act to have their studio albums specifically mastered for iTunes.

In addition, they've simultaneously released four new digital collections exclusively on iTunes, covering both studio and live recordings spanning their entire career. Tech-savvy Dead Heads now have a ton of choices -- you can download just the songs you want, the 13 studio albums and seven live albums individually, or the four different collections comprising all the tracks.

Also available are the Complete Studio Rarities Collection and the Complete Live Rarities Collection, which contain bonus material taken from expanded versions of the albums that were reissued as part of two acclaimed career-spanning boxed sets –- 2001’s The Golden Road and 2004’s Beyond Description. And no set is complete without a digital book, The Golden Road and Beyond: A Grateful Dead Primer. Available now for free on iBooks, it consists largely of the two essays from The Golden Road and Beyond Description, which were written by Dennis McNally, the band’s longtime publicist and biographer.