Which book to get?

[Lizh]

I was on barnes and noble searching for "exploring the world of lucid dreaming" and there were three different versions all from the same author. One from 1990, 1991, 1997. Because the 1997 is the newest (and the most expensive), does that mean thats the version i should get? Thanks oh btw, is that also the BEST book for lucid dreaming there is? and plz dont say i shouldnt get a book bcuz i can get all the stuff from dreamviews