Improv Resources

Books

Truth in Comedy by Del Close, Charna Halpern, and Kim "Howard" Johnson.  This is the definitive book on Chicago-style improv and The Harold.  I first read it when I had been improvising for a couple of months.  Rereading it now, I'm surprised how many "insights" I've had in the meantime were actually things I'd read in this book, but only made sense to me later.

Impro and Impro for Storytellers by Keith Johnstone.  Johnstone is the godfather of modern theatrical improv, and these two books ably document his world view.

Improvise: Scene from the Inside Out by Mick Napier.  Sets aside the traditional rules of improv, and starts with the simple idea of doing something, noticing what you did, and watching for how your partner reacts.  Includes lots of advanced improvisation techniques, and a great chapter of solo exercises to work on your improv muscles between practices.

Improvising Better: A Guide for the Working Improviser by Jimmy Carrane and Liz Allen. Each chapter of this book covers a problem improvisors run across in their work, along with one or more exercises to correct it.

Websites

Message boards used by improvisors from around the world.

Improv Interviews
Amazing in-depth interviews of top improvisors by Josh Fult. Unfortunately, some of the site navigation links are broken. I've included links to the individual interviews below for easier navigation: