London photobook stores. Recommendations?

Hello,

I will visit London soon and I am looking for bookstores with a good variety of photobooks and especially monographs. I know that Photobookstore is one of the best, but I remember that there are more. Moreover, recommendations for places with second hand books are quite welcome too.

Thanx

One of my favourites when I was living in London was:

Photobooks International | 99 Judd Street, WC1H 9NE | London

They had a wonderful range of used photobooks (as well as new), and I picked up a few there that I wasn't able to find elsewhere.