Which or not which (This is the very book that I want)

Please read:

a.This is the very book which I want.
b.This is the very book that I want.

If I don’t want remove “which” and “that”, these 2 sentences are still correct in grammar?


Which can be used in restrictive clauses, but to me it sounds awkward here.

Hi Van Khanh,

I feel that 'that is the better choice here. We use that after superlatives as in: That’s the best book that you can read and you could say the very has the same flavour.