Snow's best-known book is probably The Cotingas (Cornell UP, 1982), which is a masterly overview of this group of birds - easy to read for the non-specialist, and with excellent colour plates. It's out of print, but second-hand copies can easily be found on the internet. Highly recommended.
David Snow's standing in the bird world is summed up by the fact that he didn't merely have a species named in his honour - he had a genus: Snowornis, which contains two enigmatic cotinga species from the Andes. And he also had the honour of describing a new species to science in 1980 - the grey-winged cotinga (Tijuca condita) of SE Brazil.
David Snow was a true pioneer among ornithologists, perhaps one of the last individuals who will ever make so many new discoveries about the natural history of birds in the wild.