Strange perhaps to rate this book with stars, since it's not even a story. However, in its own category (books on improvised comedy), this is a really great one. At first, I was disheartened to learn that - like so many others - it was another list of exercises. However, their way of bringing them forward is remarkable. Each exercise is broken down into four parts: what, why, Heather's approach and Joe's approach. Sometimes you'll also find some expert advice added to it. Heather being an impoviser and Joe a musician, I found it really great to read both their approaches to each exercise. This book will come in handy countless times when preparing my improv musical workhops in the future!