Book excerpt: This is a comprehensive tutorial and reference guide to ActionScript 3, Flex, and Flexbuilder 2 that teaches readers everything they need to know about these new technologies, from the very beginning, right through advanced topics. Readers will need general web development experience, and ideally have Flash and ActionScripting experience, although this isn't essential. This book is one of the first to offer thorough coverage of these new technologies. The author, Charles E. Brown, is an acknowledged expert in Flash development and training. His in-depth knowledge of application development and effective teaching methods is evident on every page of this essential handbook.