London bookshop

Hello,
I'm going to London and one of the many things I plan on doing there is book shopping. Can you recommend a good bookshop with many books in the fields of history, anthropology. To be more exact, I intend to buy:

Marguerite Porete: The Mirror of Simple Souls
The Golden Bough by James George Frazer
Europe: A History by Norman Davies
Letters of Insurgents by Freddy Perlman( this is more anarchist literature:D)

To put it short: i want a huge place filled with books:d

Thank you!

Foyles at Charing Cross road is famous but I really don't remember it as anything special when I was there but I bought the Origin of Species by the means of natural selection there.

I do however have a vague memory of a 3 story shop for sex toys right next to it :P.