I can recommend ALTBIER by Horst Dornbusch, much better than some of the Classic Beer Styles series.
http://www.amazon.co.uk/Altbier-History ... 222&sr=1-1
Grist
Pils malt 60%
Munich malt 15%
Vienna malt 15%
Crytal malt medium colour 10%
Hops
Bitter to 40 IBU with Hall Mittelfrueh, Spalt, or Perle
Late hops ditto, about 15g in 23l
Aroma hops Spalt or Tettanger 28g in 23l
Yeast
Altbier yeast is funny stuff, a top fermenter that works best at low tempoeratures. Aim for
Primary at 13-19C, lower is better
Drop to 5-6C for a day to allow sedimentation
Diacetyl rest at 13C for a few days
Lager at low temperature. 0C is common commercially
Wyeast 1007 or
White Labs WLP036