In this Winter course, we will continue an exploration of string theory with Leonard Susskind, the physicist who first developed this important theory that attempts to reconcile quantum mechanics and general relativity. In particular, the course will focus on string theory with regard to important issues in contemporary physics. Topics will include: 1) the impact of string theory on the pursuit of black holes; 2) the string theory landscape and the implications for cosmology; and 3) the Holographic Principle and its applications.