Are you referring to The Art of Dreaming by Carlos Castenada?

If so, these two books are orders of magnitude apart when it comes to teaching you about lucid dreaming.

I've read them both. The art of dreaming is more like an adventure book while Exploring the world of Lucid dreaming is a how-to manual.

The first couple of chapters tell you what it is
The next couple tell you how to develop ability
The rest of the book tells you what you can do with it and provides example letters from people.