Two of this writer's books forthcoming (8)

I believe the answer is:

imminent

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'forthcoming' is the definition.
(synonyms)

'two of this writer's books' is the wordplay.
'two of' becomes 'im' (I can't justify this - if you can you should give a lot more credence to this answer).
'this writer's' becomes 'mine' (belonging to the crossword setter).
'books' becomes 'NT' (abbreviation for New Testament).
'im'+'mine'+'nt'='IMMINENT'

Can you help me to learn more?

(Other definitions for imminent that I've seen before include "Likely to happen at any moment" , "About to happen very soon" , "Approaching fast" , "Close at hand, about to occur" , "About to happen, looming" .)

I've seen this clue in The Telegraph.

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