Two versions of this person's books about to arrive (8)
I believe the answer is:
imminent
'about to arrive' is the definition.
'two versions of this person's books' is the wordplay.
'two versions of' becomes 'im' (I can't justify this - if you can you should believe this answer much more).
'this person's' becomes 'mine' (belonging to the person speaking or writing).
'books' becomes 'nt' (New Testament).
'im'+'mine'+'nt'='IMMINENT'
(Other definitions for imminent that I've seen before include "Close at hand, about to occur" , "About to happen, looming" , "Happening any moment now" , "Likely to happen at any moment" , "Approaching fast" .)