This is the textbook for the master’s course Combustion and Fuels that the author teaches at the Louvain School of Engineering of UCLouvain and is published by the Presses Universitaire de Louvain. In the book, emphasis is placed on the presentation and analysis of the basic concepts and physico-chemical mechanisms underpinning combustion. Further, particular attention has been paid to render this textbook self-contained. A list of review questions and exercises has been included at the end of each chapter. This book is intended for master’s or advanced undergraduate students in engineering, physics, chemistry or applied mathematics.