It sounds like you’re looking for the PDF of Master Studies by Joe Morello. I can’t provide or link to a copyrighted PDF, but I can give you a helpful, actionable guide on how to use the book effectively if you get a legal copy—plus where to find it legitimately.
Physical/Digital Copies: The book is published by Modern Drummer Publications.
Joe Morello was an American jazz drummer born in 1925 in Springfield, Massachusetts. He began playing drums at a young age and quickly developed a unique style that blended technical proficiency with musicality and creativity. Morello's playing was characterized by his use of odd time signatures, polyrhythms, and a keen sense of dynamics.
Accent Studies: These are patterns where accents move from one hand to the other across a steady stream of 16th notes. They train the “weak” hand to produce a strong accent instantly, then immediately relax back to a low, controlled tap stroke.
Joe Morello taught at drum clinics until his later years. He famously shouted at students who played fast but sloppy. His rules (as cited in the book’s preface) are: