On kindle:
http://www.amazon.co.uk/Holding-Briefs-ebook/dp/B004N6371Q/ref=sr_1_1?ie=UTF8&qid=1345211757&sr=8-1
In paperback:
http://www.amazon.co.uk/Holding-Briefs-1-Andrew-Calow/dp/1478122757/ref=sr_1_5?ie=UTF8&qid=1345211757&sr=8-5
And since you ask, I did self publish. Since I published first on to kindle and only recently in paperback, there are two different entries. As for the content of the novels, the only difference is that the paperback includes the ISBN number inside, but this is omitted in the kindle version.
One problem I did find was that going via kindle, my initial cover was an upright image with text superimposed. When i went to paperback, I used the Createspace Cover creator and needed a square image (approx 2" square).
I also included the first few pages of a draft of the sequel (with a warning that this was taken from a draft and may not be exactly as in the final version).