books.google.co.uk - In a career that has spanned four decades, choreographer Twyla Tharp has collaborated with great musicians, designers, thousands of dancers, and almost a hundred companies. She's experienced the thrill of shared achievement and has seen what happens when group efforts fizzle. Her professional life has...http://books.google.co.uk/books/about/The_Collaborative_Habit.html?id=pgIjw9XecBIC&q=billy&utm_source=gb-gplus-shareThe Collaborative Habit