Guzziology Version 9
The Complete Book of Moto Guzzi: Every Model Since 1921 (Complete Book Series)
Moto Guzzi 2-valve big twins: V7, 850GT, V1000, V7 Sport, 750 S, 750 S3, 850 Le Mans, 1000 Le Mans, 850 T, T3, T4, T5, (Essential Buyer's Guide)
The Moto Guzzi Sport & Le Mans Bible