I love the Brick Lane Bookshop. Situated in Brick Lane (obvs), it's an independent bookshop which has a fine range of the Graphics Guide To... books.
In addition, it often seems to have other books I haven't heard of, and there are always thin books, like an Orwell essay, for a few pounds.
They also do events, though I've not managed to get to one yet. In addition, they offer a 10% student discount on presentation of a valid student card.
It's small, packed with books, warm, cosy and the staff have always been friendly whenever I've ventured in.
Perhaps even better news is that if you become hungry after the strenuous activity of searching for, and buying, books, the famous Beigel Bake is just a three minute walk down the road. Unlike the bookshop, that's open 24/7. It's a shame in a way that it isn't the other way round, but we can't have everything I suppose!
Details of where the Brick Lane Bookshop is, plus opening times and lots of other information, may be found here: