Feynman Lectures on Physics. Vol. VI (8 - 9)

At one time, the instructors at the California Institute of Technology contemplated how the physics course could be restructured to make it more engaging and modern. Richard Feynman enthusiastically embraced this idea and agreed to deliver a unique two-year course of lectures on general physics, but only once. The university, for which this event became historical, organized the recording of the lectures, and then a team of physicists prepared a three-volume edition, which is still considered one of the best introductory courses on physics.
In Russian, the three-volume set was published in parts, totaling nine issues. This edition consists of 6 volumes; the volume numbers mentioned by the editor in the comments are indicated in the publication data in parentheses after the volume number.
The sixth volume of the “Feynman Lectures on Physics” includes lectures on quantum mechanics.