Most Popular Books
- Checklist of the Birds of Northern South America: An Annotated Checklist of the Species and Subspecies of Ecuador, Colombia, Venezuela, Aruba, Curacao, ... & Tobago, Guyana, Suriname and French Guiana
- Birds of Northern South America: An Identification Guide, Volume 2: Plates and Maps
- Birds of Northern South America: An Identification Guide, Volume 1: Species Accounts
