The third volume was left unfinished due to Sakurai's sudden death in 1982, but was later edited and completed with the help of his wife, Noriko Sakurai, and colleague San Fu Tuan. Modern Quantum Mechanics is probably his most well known book and is still widely used for graduate studies today.
The third volume of Sakurai's work remained incomplete after his death in 1982, but was later revised and completed with the aid of Noriko Sakurai and San Fu Tuan. Modern Quantum Mechanics is likely his most recognized book and remains a standard text for graduate students today.