Mick Walker
Aprilia: The Complete Story
Ducati Twins
Moto Guzzi twins: All V-twins, 350 through 1000cc, plus parallel twins--1964 onward (Osprey collector's library)
Superbike Specials of the 1970s: Machines, Riders and Lifestyle a Pictorial Review (Mick Walker on Motorcycles, Vol 2)
Laverda Twins and Triples: The Complete Story
Performance Motorcycles: Masterpieces of Engineering