IIRC, thier team got split in half for some reason, and the other part was able to E&E overland. (Either that, or they got picked up within a hard spitof the border- it's been a while since I read over the accounts.) I think the other book is from that perspective, but I haven't read it yet myself.

I also know that McNabb has lost a lot of friends since he published. Anything approved by the MOD should be read with that in mind.