Here a few recommended books.

Gefährliche Nachbarn
22 short thrillers form the Swiss-German border area..
Published by Barbara Grieshaber, Siegmund Kopitzki. Gmeiner Verlag. 323 pages.
CHF 18.90

Daniel Badraun: Rheinfall
TatortSchweiz. Limmat Verlag. 194 pages.
CHF 29.90

Sie waren am Rheinfall
The Rhine Falls in European literatur. Texts from the Middle Ages to the present.
 Published by Heinrich Gebhard Butz. Chronos Verlag. 352 pages.
CHF 38.90

Der Rheinfall
Currents, Tumults, Reflections. Illustrated by Michael Lio. Published by Roger Fayet.
Hier und Jetzt Verlag. 256 pages.
CHF 55.00

Eleonore Spalinger-Ehbrecht: Mein Leben am Rheinfall
40 Years Dachsen, 1966-2006. Books on Demand GmbH. 372 pages.
CHF 36.90

Available at bookshops or www.books.ch