If you absolutely cannot afford the $15 right now, there are legal alternatives that cover similar ground (and might be free via library apps):
However, none of these replace Master Studies because they lack Morello’s specific shifting accent grids designed for the drum set. joe morello master studies pdf link
Unlike many drum books that focus on drum set patterns, Master Studies is a hand technique book for snare drum, drum set, and percussion. It focuses on three core tenets: If you absolutely cannot afford the $15 right
Alfred Music holds the copyright. They offer a digital version of Master Studies directly on their website. However, none of these replace Master Studies because
While many books teach the "open roll," Master Studies teaches the controlled roll. Morello’s method for developing the "multiple bounce" stroke (the buzz roll) and the "stroke-out" double stroke is arguably the best ever written.