Preface Acknowledgments What is an Electroon? (M J Perry) The What and Why of Moduli (J Conlon) Perspective on the Weakly Coupled Heterotic String (M K Gaillard) Geography of Fields in Extra Dimensions: String Theory Lessons for Particle Physics (H P Nilles & P K S Vaudrevange) The String Landscape: A Personal Perspective (K R Dienes) Mathematics for String Phenomenology (M R Douglas) The String Theory Landscape (A N Schellekens) Local String Models and Moduli Stabilization (F Quevedo) F-Theory: From Geometry to Phenomenology (S Schaefer-Nameki) Compactified String Theories - Generic Predictions for Particle Physics (P Kumar) How Could (Should) We Make Contact Between String/M Theory and Our Four-Dimensional World? (G Kane) String Cosmology - Large-Field Inflation in String Theory (A Westphal) Dark Energy in String Theory (B Greene & G Shiu) Cosmological SUSY Breaking and the Pyramid Scheme (T Banks)