Abstract: This book is a primer on corporate law for law students and anyone else interested in the foundations of corporate law. The book provides a self-contained, accessible presentation of the field’s essentials: what corporations are, how they are governed, their interactions with their investors and other stakeholders, major transactions (M&A), and parallels with alternative entities including partnerships. Optional background chapters cover the investor ecosystem, contemporary corporate governance, and corporate finance. The book’s exposition of doctrine and policy is nuanced and sophisticated yet short and simple enough for a quick read.