The one thing that I didn't like about the book was that he gave dozens of different techniques for bringing about a lucid dream, - but didn't really explain which ones to apply and when and in what combinations. If one isn't working how long should I stick with it, - a day, a week, a month?
However, just for the experience that one lucid dream was worth the price of the book.
Of his two books, I think this one is a far more practical guide.
In "Exploring the World of Lucid Dreaming", Stephen LaBerge discusses far more efficient techniques, including one pioneered by himself - MILD, or Mnemonic Induction of Lucid Dreams. He explains how to create conditions conducive to lucid dreaming, how to prolong a lucid dream once one has one, and how to use lucid dreams for creative problem solving, health, entertainment and spiritual growth.
I should point out, however, that there is no miracle method for having lucid dreams instantanously. The techniques that this book offers still need to be exercised, patiently and diligently over a period of weeks if not months before results will start to materialize. But if you are willing and motivated to invest the necessary work and effort, this book will be one of the best guides there is. For those readers who prefer a simple, step-by-step approach, I would also recommend "Lucid Dreams in 30 Days" by Keith Harary and Pamela Weintraub.