If you are looking for the "top" resource in this domain, Principles of Helicopter Aerodynamics is highly recommended. It is most valuable for:
J. Gordon Leishman's Principles of Helicopter Aerodynamics is widely regarded as a definitive resource for both students and practicing engineers in the field of rotary-wing aviation. The text offers a modern, comprehensive treatment of the scientific and engineering challenges unique to vertical lift aircraft. Cambridge University Press & Assessment Core Content & Structure If you are looking for the "top" resource