I recently released my fourth book Microsoft Dynamics GP Workflow 2.0.
Initiallially it was available only as an eBook in PDF format, but now the paperback format is available from Amazon UK and Amazon US.
I will be adding ePUB and MOBI formats to the existing eBook format which you will receive free of charge, should you request, after buying the PDF version. I hope to have them available very soon (I am working on the format at the moment and will add them as soon as they are complete).
The book will also then become available from other retailers too (including the Apple Store).