"Principles of Helicopter Aerodynamics" by Gordon P. Leishman
Before the advent of Leishman’s text, the rotorcraft community relied heavily on classics like Gessow & Myers (1952) or Bramwell’s Helicopter Dynamics (1976). While foundational, those works lacked the computational fluid dynamics (CFD) integration and modern rotor analysis that emerged in the late 20th century. "Principles of Helicopter Aerodynamics" by Gordon P