Beyond the Desert 2003

This book contains the Proceedings of the Fourth International Conference on Particle Physics Beyond the Standard Model - BEYOND THE DESERT 2003. Emphasis at BEYOND03 was put on supergravity, which had its twentieth birthday that year, on neutrino physics and dark matter search, and on gravitation and cosmology, and some other very important fields. The book resents a timely and valuable overview of the status and future potential and trends in theoretical and experimental particle physics, in the complementary sectors of accelerator, non-accelerator and space physics.