Author of the book is John Andrew Morrow, did some digging on his personal site and found his CV and some links to other works he recommends: CV: http://johnandrewmorrow.com/cv/ LINKS: http://johnandrewmorrow.com/links/ Notice the link to the Ammam message.
obviously, the original arabic will reveal more about the authenticity of these 'docs.' these are forgeries probably extrapolating an (authentic) earlier pact with the christians of najran. let us take the first one. sub'HanAllah! witness the mujizah of the Prophet sallAllahu alayhi wa sallam. did RasulAllah sallAllahu alayhi wa sallam write any covenant? i don't know if naSara were addressed thus at that time. the forger seems to be unaware of qur'anic verses. again. besides, it was: ------------------------------------------------------ so also in the second one it is good to know that muslims had already started using the calendar by the fourth year of the hijrah. --------------------------------- the third is even more funny: good that he acknowledges upfront that it is not found anywhere else. 'written' again; and instead of just Muhammad RasulAllah (sallAllahu alayhi wa sallam) we have seen in saHiH narrations, there is this lengthy description mentioning father and grandfather.
http://covenantsoftheprophet.wordpress.com/2013/08/11/the-covenant-of-the-prophet-muhammad-with-the-christians-of-the-world-1630/ http://covenantsoftheprophet.wordpress.com/2013/08/11/the-covenant-of-the-prophet-muhammad-with-the-christians-of-persia/ http://covenantsoftheprophet.wordpress.com/2013/08/11/the-covenant-of-the-prophet-muhammad-with-the-christians-of-the-world-1538/ ---- someone sent this to my mail.