“Life at Performance Level” by Curtis Zimmerman is a self-help textbook focused on business and economics. The hardcover book is written in English and contains 230 pages of insightful content. It is designed for adult and further education levels, making it a valuable resource for individuals looking to improve their performance in various aspects of their lives. With a general subject area and a renowned author like Curtis Zimmerman, this textbook offers a comprehensive approach to personal development and professional success.