Brandt books, Switzerland Without a Car! http://www.bradt-travelguides.com/details.asp?prodid=79

I moved to Zurich almost 4 weeks ago and Im sooo happy I bought this book! Its fantastic not just for rail travel, but also for busses, biking, hiking and city trams. One problem I have with it is that it does not include the prices for restaurants it suggests, train prices, and so on, this is the only problem. It is still a very thoughful book, organized incredibly well with a great index, it even tells you which side of the train one should sit on for the best view! Definitley get the halbtax, and if you are under 25, get the track 7 pass for free travel after 7pm (except on the ZVV).