After 30 years of service, there finally is a book that thoroughly covers the early F-16 variants!! Using 1009 full-color photos spread over 196 pages, the Early Viper Guide takes the familiar theme from other titles in The Modern Guide Series and directs attention to the A/B models of the F-16. All A/B variants are extremely well-documented, including the Block 1, 5, 10, 15, 15 ADF, 15 OCU, 20, and the F-16 MLU. USAF, USN, and export versions are covered. Each of the Blocks--and the nations flying them--are compared and contrasted with photos and text describing the many differences among these earliest variants.