'As someone doing research and advising graduate students in a closely-related area, I am happy to see a book like this in the literature. It will help readers to learn this subject, and to gain a deep understanding of the foundational ideas.' Julie Bergner, MAA Reviews
Preface; 1. Prelude; 2. Basic homotopical algebra; 3. The homotopy theory of ∞-categories; 4. Presheaves: externally; 5. Presheaves: internally; 6. Adjoints, limits and Kan extensions; 7. Homotopical algebra; References; Notation; Index.