"An Actor's Business" by Andrew Reilly is a comprehensive guide that focuses on the business side of being an actor. This book is likely to cover essential topics such as networking, self-promotion, marketing, auditioning, and managing the practical aspects of an acting career. Through practical advice, case studies, and insights, "An Actor's Business" is likely designed to help actors navigate the competitive entertainment industry, make informed career decisions, and create a strategic plan for building a successful and sustainable acting career.