Hi Jay.
It is certainly is a describable book.
A second edition is thought to be in the pipeline but has been for a while and the author is unwell.
As for its value it will depend on its condition is it damaged and/or missing pages?
Your looking at around £100-150. Possibly a bit more if you it list on ebay and are fortunate. I have seen copies of this book sell for £200+
Does it have its original box too?
