Barney Hoskyns, Across the Great Divide: The Band and America (1993)
Generally considered the definitive work on The Band, Across the Great Divide explores the origins, impact, and internal dynamics of the Canadian-American band. First released in 1993, a newer version brings readers up to date on the lives of the members who are still alive.
Levon Helm and Stephen Davis, This Wheel's on Fire: Levon Helm and the Story of the Band (1993)
An inside and far more gritty account of The Band's development and work. There's plenty in here for the sensation-seeking, but Helm also provides useful commentaries on the group's songs and albums. His gripe with Robertson is also aired.