I have just read a book on lucid dreaming which seemed to increase my lucid ability simply by reading it. While reading it I was having lucid dreams nearly every night. Before I tell you the title, two things:

1) This book is not a 'how to' book and is more suitable for those who already know the main techniques for inducing lucid dreams. If you are a beginner I'd recommend ETWOLD by Stephen LaBerge.

2) Don't be put off by the title. The book was written by a man born in 1885 and he didn't know whether his experiences involved traveling outside of his body or not. As we all know, lucid dreams, SP and FAs all can feel like you are leaving your body and there was not much scientific research on the subject back then.

The book is called "Astral Projection: A record of out-of-the-body experiences" by Oliver Fox

There are loads of copies on ebay/amazon for only $1 (excl shipping)

The book is a beautifully narrated account of the author's discovery of lucid dreaming as a young boy and his ongoing experiences and experiments over the years. He writes very descriptively and reading it activates your visualization and imagination specific to being in dreams and false awakenings. I believe that reading this book primed my mind and caused me to have lots of lucid experiences. I mean, it makes sense: If you spend lots of time thinking about, visualizing and imagining the feeling of being in a dream during the day and especially before bed, then it's bound to have some influence on achieving lucidity.

I could barely put this book down while I was reading it. The only reason I did was that I wanted to spin it out! It was so fascinating reading about someone having lucid dreams nearly a century before I was born! Reading about the lifestyle back then adds an element of interest too.

But like I said before, the book is probably only useful if you have already experienced at least one LD so you can relate to his descriptions of LDs, FAs and SP and imagine them vividly and realistically as you read.

Let me know what you think if any of you read it