This book presents a collection of novel contributions and reviews by renowned researchers in the foundations of quantum physics, quantum optics, and neutron physics. It is published in honor of Michael Horne, whose exceptionally clear and groundbreaking work in the foundations of quantum mechanics and interferometry, both of photons and of neutrons, has provided penetrating insight into the implications of modern physics for our understanding of the physical world. He is perhaps best known for the Clauser-Horne-Shimony-Holt (CHSH) inequality. This collection includes an oral history of Michael Horne's contributions to the foundations of physics and his connections to other eminent figures in the history of the subject, among them Clifford Shull and Abner Shimony.

Introduction.- Remembering Mike.- AIP Oral History Interview with Mike Horne.- Laboratory-Space, versus Configuration-Space Formulations of Quantum Mechanics, versus Clauser Horne Local Realism.- Neutron Spin Pendellsung Resonance.- Mike Horne and the Aharonov-Bohm Effect.- The essence of Entanglement.- Does a Single Lone Particle Have a Wavefunction ? YES.- Complementarity and Decoherence.- Complementarity between one- and two-body visibilities.- GHZ, as seen through the Looking Glass.