Book excerpt: Everyone knows the legends – Hendrix, Page, Clapton, Beck, and all the other six-string giants – but the evolution of guitarcraft wasn't forged purely by über-famous players with large cultural footprints. Scores of lesser-known pioneers such as Tommy Bolin, Danny Cedrone, Tampa Red, and Sister Rosetta Tharpe contributed vast numbers of licks, riffs, solos, tones, compositions, techniques, and musical concepts that inspired generations of guitarists and advanced the art of playing guitar. Their stories are as critical to modern guitar music as is electricity or amplification. Any guitarist seeking to devise a unique and individual sound should study the wacky, off-kilter, unfamiliar, and criminally underutilized creative concepts of the unsung greats, straight from the pages of Guitar Player magazine.