String theory made understandable. Barton Zwiebach is once again faithful to his goal of making string theory accessible to undergraduates.He presents the main concepts of string theory in a concrete and physical way to develop intuition before formalism, often through simplified and illustrative examples.Complete and thorough in its coverage, this new edition now includes AdS/CFT correspondence and introduces superstrings.It is perfectly suited to introductory courses in string theory for students with a background in mathematics and physics.New sections cover strings on orbifolds, cosmic strings, moduli stabilization, and the string theory landscape.Now with almost 300 problems and exercises, with password-protected solutions for instructors at www.cambridge.org/zwiebach.