Also OT. The booklet ran to a second edition at the end of 1987. For what it sets out to do, it's really excellent—as you'd expect from John Price. But it really doesn't deal with the history and development of Berlin's railway system, either from the beginnings through to the mad Hitler/Speer plans that were still being developed during WW2 or for the time when the Deutsche Reichsbahn der Deutschen Demokratischen Republik was busily keeping its own trains cler of the wicked west and (in railway terms) isolating the island of West Berlin whilst still trying to get whatever hard currency it could from traffic to and from the west.Off topic, but there was a very useful (in English) book published by Thomas Cook in 1986 specifically about rail travel through Berlin, giving history of the lines and details of their operation past and present (up to then). "Berlin Transit", written by John Price, the long term editor of Cooks Continental Timetable, as well as a serial tram buff, for which he sneaked a section in. Covers main line, S-Bahn and U-Bahn. Written primarily for travel trade staff to answer the innumerable questions they got about rail travel through the city. The "Transit" in the title is reference to passing through into the DDR, rather than the USA term for urban rail systems. I still take mine when I go there.
Here it is. You get an odd secondhand one turn up
berlin transit book 1980 thomas cook - Google Search