I would suggest the book. Its great Just watching the first video has helped me a lot. It teaches you everything from how and where to drive the boat to some great edging drills. Just little tips that will help out a ton. I would suggest going for the book right now and then get a new vest later.
if you have one of those orange vests that someone looks like they put you in the stocks then i would get a new vest, but chances are you have an *acceptable vest* so get the book
WHAT VEST DO YOU HAVE? WHAT CONDITION IS IT IN? IS IT FALLING APPART?
lets know this first then we can give you a better answer