SAP B1 To Go book

Can anyone give me a link so that I can download the book 'SAP Business One ... To Go' for v 2007A from the SAP website?

I have the 2005A version, but I want to make sure that I have the latest for 2007A. I would also like to be able to know where it is accessed on the portals.

(Is it just me who thinks that the SAP portals make it difficult to find anything?)

Regards,

Douglas