"JavaScript & Ajax for Dummies" is a comprehensive guide that helps beginners learn how to program using JavaScript and AJAX to enhance web pages. The book is divided into four parts, covering topics such as writing programs, using conditions and loops, working with functions and objects, and improving user interaction with AJAX. It also introduces jQuery, a popular JavaScript library, for creating animations, user interfaces, and handling AJAX data. The book includes practical examples, tips, and resources to help readers understand and apply these concepts effectively.