This "Gold Edition" costs (price) more and claims to add 15 chapters to the standard edition. In reality, these 15 chapters are on very arcane subjects, and nine of them just document some sample applications. Worse, to make room for the chapters, the Gold edition shoves the nine-chapter JavaScript Tutorial (Chapters 4-12) off the printed version of the book and makes them accessible only on CD. The basic edition of the book includes this nine-chapter JavaScript Tutorial in the printed book and (like the Gold edition) also includes the full text on CD. The basic edition even includes the 15 bonus chapters from the Gold Edition on its CD!Save (price) and get the standard edition. Note: my one-star rating reflects the Gold Edition packaging, not the content of these books. Also, the Gold Edition comes in hardback, if that matters.