We recognize the field of Behavior Analysis has a need for a book aimed to guide practitioners of ABA in building quality firms, ethically. This is chiefly in response to the new market strategy of private equity firms and venture capitalists acquiring and managing Applied Behavior Analysis agencies. Like each of you reading this book, we love the science of ABA, and we are concerned that the business interests of firms run by those who must report to investors are antithetical to a consumer-centered therapy as intensive as ABA. This trend, while distressing, is not irreversible. This book is designed to be a field manual to the ABA entrepreneur on how to start and grow a seven-figure behavior therapy business.