English grammar book recommendations

Can you recommend any good English grammar books for intermediate and advanced learners? Some of my favourites are:

*English Grammar in Use (Raymond Murphy)
*Essential English Grammar (Raymond Murphy)
(the whole IN USE series is really good including the supplementary exercises that can be bought separately)
*Living English Structure (Longman publication)

Martha Kolln's Understanding English Grammar is my all time favorite.

This isn't strictly grammar, but R. L. Trask's Mind the Gaffe! is great. And funny.

One entry explains how a fully gramatical sentence can make absolutely no sense at all. One of the examples is:

The square root of seven is green and squishy.

... which is perfectly gramatical, but absolutely nuts.

I really like working with Practical English Usage by Michael Swan.

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I just joint today and I don't know very much what should I do and where should I go. Even after this I have to think it over if after I leave this site how can I come back again??

after I leave this site how can I come back again??

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