In reply to simon lambert:
Hi, as I am sure you know the current guides are rather crap (more or less a list of routes), while selective topo guides are only available for individual regions. AFAIK there are good topo guides for the Bielatal and Rathen areas, plus a new one with 80 or so classic (i.e. largely suicidal) routes.
My advice would be to go to the climbing section of the Globetrotter store in Dresden, where they normally have them all in stock (Prager Strasse, 800m or so from the station in the pedestrian zone).
Bernd Arnolds shop in Hohenstein would also be a good bet, as would be the national park centre in Bad Schandau or the Ottomühle beer garden / ice cream stall in Bielatal.
CB