Akateeminen Kirjakauppa is a smashing bookstore in the heart of Helsinki. I could easily spend a whole day in there. Designed by Alvar Aalto in the 60's it stretches out on three storeys, making it the biggest bookstore in Scandinavia. It has about half a million books in many languages, very friendly knowledgeable staff and even Cafe Aalto with its own bakery (and Finns are good bakers alright!).