I agree with Chirag too. What I would like to say is that instead of running after completing books (new or even those which you have), one should try to ensure that one 'knows' things; books are just a means to an end, what matters is how much you know.
Even if you (hypothetically) don't solve any book but have superb retention and access to great notes, then you don't even need a book, they are just tools so we can practice our knowledge to help to retain things and to familiarize oneself with different patterns to answer questions. Meanwhile, just doing a book, ticking all the questions, does not ensure that you know all that is needed for the exam.
So do whatever makes you feel comfortable with things, so that you can recall the requisite things as per your convenience.
Anyway, that's my opinion and is anyday as good as anyone else's, so I may be wrong, but then it is what I believe in. Hope it helps.