The book follows a "Code first, explain later" approach, using practical examples in PHP to demonstrate unique features of MongoDB. This book is packed with step-by-step instructions and practical examples, along with challenges to test and improve your knowledge. This book assumes that you are experienced in web application development using PHP, HTML, and CSS. Having working knowledge of using a relational database system such as MySQL will help you grasp some of the concepts quicker, but it is not strictly mandatory. No prior knowledge of MongoDB is required.