Comment My top 3: Sussman & Wisdom, Dirac and Penrose (Score 1) 418
Sussman & Wisdom's "Structure and Interpretation of Classical Mechanics" is a must-read. It presents the very general Lagrangian formulation of classical mechanics using a clear, unambiguous Scheme-like language. It's a gem. (Sussman's "Structure and Interpretation of Computer Programs" was the intro CS book at MIT for years.)
Dirac's "Principles of Quantum Mechanics" is a highly readable introduction to the field. Dirac didn't (and couldn't) assume much prior knowledge. This book is the origin of the supremely clever bra-key notation.
Roger Penrose's "Road to Reality" is an engaging coverage of much of modern physics as well as the prerequisite mathematics.
