Okay, you're not going to like this, but here goes. You need 3 things. Start off w/ Spot's dvd. Nothing like being shown how to do things. Books are inherently slower. Then get either the dvds at http://www.vegastrainingandtools.com/ or Spot's book next. You need all 3. Lots of different ways of doing things with Vegas and the other dvd set approaches things differently and will definitely pay for itself many times over in saved time. Spot's book has excellent references, extras, and more indepth stuff than the dvds.
So, if you're serious about Vegas I say you need at least all this. But I'd defintely also get the Sound Forger dvd. Why? B/c after watching it and practicing a bit you will have an edge over nearly every editor you'll meet in the audio dept and audio is more than half of editing in my opinion.
There are times to scimp and times to spend money. Believe me when I say spend now. Ask how many people here (or any other Vegas site) bought the various dvds and thought they didn't get their money's worth. I'd be surprised it you found anyone.