A collection of facsimile reprints of papers on Quantum Mechanics authored and co-authored by Jean-Pierre Vigier, compiled and presented to him at a conference held to honour him on his 80th birthday at University of California at Berkeley, August 2000. The book contains a preface by Stanley Jeffers and an introduction by Lev Chebotarev. Jean-Pierre Vigier (born January 16, 1920) earned his Ph.D. in Mathematics from University of Geneva in 1946 and served briefly as a member of the French Atomic Commission together with Frederic Joliot-Curie. In 1948 he was appointed assistant to Louis de Broglie (Nobel Prize in 1929 for discovery of wave nature of particles), a position he held until the latter's retirement in 1962, although their collaboration lasted another 10 years. He is the author of more than 200 scientific papers, and has co-authored and edited a number of books and conference proceedings. He is a member of the editorial board of Physics Letters A, and remains one of the most vocal proponents of the Stochastic Interpretation of Quantum Mechanics.