Life on the Contingency Plan
Theory is the thing here, this is a study of theories. It does gesture at practices, but in ways that show how thinking and writing about improvisation are so beholden to theory that the book is full of claims that sound like they are being made by an alien, sent to study the human race and report back on the marvelous, intriguing strangeness of all these creatures.
Source: brooklynrail.org