This book contains some important new contributions to the theory of structured ring spectra.

This book introduces a new point-set level approach to stable homotopy theory that has already had many applications and promises to have a lasting impact on th

A graduate-level introduction to the homotopical technology in use at the forefront of modern algebraic topology.

The author introduces the notion of a Galois extension of commutative $S$-algebras ($E_\infty$ ring spectra), often localized with respect to a fixed homology t