[ensonar]

Have you read "The Art of Dreaming" yet? That's the most in depth book on dreaming by Castaneda. However, there are other bits and pieces in "Journey to Ixtlan" and "Tales of Power" by Castaneda, and "Being In Dreaming" (by Florinda Donner)

Have you attempted "stopping the internal dialogue" in your waking hours? I've found that the type of concentration required to stop talking to yourself in your head is very similar to the type of concentration needed to remain focused in dreaming. Stopping the internal dialogue creates a calm clarity which is very useful in dreaming.