1. 2000 Champagnes by Richard Juhlin (Methusalem AB)
Juhlin is one of the most Champagne-obsessed journalists around and this comprehensive book (there really are 2,000 Champagnes described inside) reflects his singular focus.
2. Champagne Guide by Eric Glatre (Abbeville Press)
A native Champenois residing in Epernay, Glatre has written a handy-sized hardback that includes profiles of all the major Champagne houses as well as a useful history of the region itself.
3. When Champagne Became French: Wine and the Making of National Identity by Kolleen M. Guy (The Johns Hopkins University Press)
If your interest in Champagne is as scholarly as it is gustatory, then this academic work detailing the social and cultural history of Champagne is an unparalleled guide.