Hugendubel

Good location and decent selection. It may be worth considering, though, whether the customer service desk is the best place for unhelpful and unfriendly employees.

We went there on October 8 and it was another really nice Hugendubel; huge - with a great selection - and lots of (comfortable) seating plus very pleasant employees.

Note that there's a charge to use the restroom.

I like to browse here on my lunch break. The English section is pretty varied, more fiction than non-fiction. They have a small scifi area on the 2nd floor. The fiction/nonfiction is at the top. Toilets are 50¢

I needed some driving maps for several European countries and they had them all. Lovely bookstore with an extensive English book section for us non-Germans.