The Feynman Lectures on Physics is perhaps his most accessible work for anyone with an interest in physics, compiled from lectures to Caltech undergraduates in 1961–64. As news of the lectures' lucidity grew, a number of professional physicists and graduate students began to drop in to listen. Co-authors Robert B. Leighton and Matthew Sands, colleagues of Feynman, edited and illustrated them into book form. The work has endured and is useful to this day. They were edited and supplemented in 2005 with "Feynman's Tips on Physics: A Problem-Solving Supplement to the Feynman Lectures on Physics" by Michael Gottlieb and Ralph Leighton (Robert Leighton's son), with support from Kip Thorne and other physicists.
Feynman, Richard P.; Leighton, Robert B.; Sands, Matthew (1970). The Feynman Lectures on Physics: The Definitive and Extended Edition. 3 volumes (2nd ed.). Addison Wesley (published 2005, originally published as separate volumes in 1964 and 1966). Includes Feynman's Tips on Physics (with Michael Gottlieb and Ralph Leighton), which includes four previously unreleased lectures on problem solving, exercises by Robert Leighton and Rochus Vogt, and a historical essay by Matthew Sands.
Feynman, Richard P. (1961). Theory of Fundamental Processes. Addison Wesley.
Feynman, Richard P. (1962). Quantum Electrodynamics. Addison Wesley.
Feynman, Richard P.; Hibbs, Albert (1965). Quantum Mechanics and Path Integrals. McGraw Hill.
Feynman, Richard P. (1967). The Character of Physical Law: The 1964 Messenger Lectures. MIT Press.
Feynman, Richard P. (1972). Statistical Mechanics: A Set of Lectures. Reading, Mass: W. A. Benjamin.
Feynman, Richard P. (1985b). QED: The Strange Theory of Light and Matter. Princeton University Press.
Feynman, Richard P. (1987). Elementary Particles and the Laws of Physics: The 1986 Dirac Memorial Lectures. Cambridge University Press.
Feynman, Richard P. (1995). Brian Hatfield, ed. Lectures on Gravitation. Addison Wesley Longman.
Feynman, Richard P. (1997). Feynman's Lost Lecture: The Motion of Planets Around the Sun (Vintage Press ed.). London: Vintage.
Feynman, Richard P. (2000). Tony Hey and Robin W. Allen, ed. Feynman Lectures on Computation. Perseus Books Group.