This book proves some important new theorems in the theory of canonical
inner models for large cardinal hypotheses, a topic of central
importance in modern set theory. In particular, the author 'completes'
the theory of Fine Structure and Iteration Trees (FSIT) by proving a
comparison theorem for mouse pairs parallel to the FSIT comparison
theorem for pure extender mice, and then using the underlying comparison
process to develop a fine structure theory for strategy mice. Great
effort has been taken to make the book accessible to non-experts so that
it may also serve as an introduction to the higher reaches of inner
model theory. It contains a good deal of background material, some of it
unpublished folklore, and includes many references to the literature to
guide further reading. An introductory essay serves to place the new
results in their broader context. This is a landmark work in inner model
theory that should be in every set theorist's library.