The book here is still available and it's usually included in the box with the Diana of your choice (I have 4 of them). I've read it, I like it and I have found that I have had similar experiences. In particular I enjoyed the story about the client who was horrified that the professional photographer was going to use the Diana to complete their photography job. An excellent example that photography and lomography is more than the equipment that is used.
It's worth a look and it gives a broad and highly individualized definition of what is lomography. The eternal question.