Maggs Beneath the Covers.

Definitely worth a visit if you can get to it before 21st December is Beneath the Covers at Maggs Bros Ltd. 
12 artists have made work in response to some of the rare and unusual books that can be found at Maggs. Read more about it here...

Maggs Bros. Ltd
50 Berkely SQ.
London
W1J 5BA

5 mins walk from Green Park Tube