Although it stands alongside contract and tort as a primary source of private law obligations, unjust enrichment is less well known than the other grounds of liability. That lack of familiarity creates a risk of error and injustice.

Written by Mitchell McInnes, Canada's leading authority on the law of unjust enrichment, Fundamental Principles of Canadian Unjust Enrichment was designed to introduce judges, lawyers, and students to this subject area. It provides a succinct statement of the principles and rules that govern restitutionary liability. While attentive to the subject's historical evolution, the book focuses on the law of unjust enrichment that is practised in Canadian courts today. It takes a practical approach, and uses recent cases and numerous diagrams to illustrate key concepts.

Consistent with the manner in which the Canadian legal system formulates and resolves restitutionary claims, Fundamental Principles of Canadian Unjust Enrichment is divided into four parts: