The Prague City Tourism Office (address: Arbesovo namesti 4, Prague 5) published a wonderful (+ free) 88 page book that covers a fantastic range of historical/cultural topics regarding Prague in the 20th cent.
It's called "Prague 1918-1992", it's amazingly well-researched and interesting and is absolutely not the typical well-worn tourist fare. E.g.:
- 1964 : Lemonade Joe/socialist cinema
- 1960: Kofola/communist Coca Cola
- 1951: The Favorit bicycle
- 1930: The Müller villa
- 1926 : Edison transformer station
- 1975: Kotva and Maj dept. stores
- 1986: Jaroslav Seifert, the irrepressible poet