I started off with "Digital Video and Audio Production" for Vegas 4.0
Published by Sonicfoundry press. With step-by-step,easy to understand instructions, you'll quickly grasp the basics and gain a solid foundation of the software.
Spot's book will enhance your knowledge to produce better videos.
there USED to be a Quick Start Manual with Vegas 3 but now the only thing we can find on their links is a german version for V4... bizarre they didn't keep the english version...