Seabirds of the World: A Photographic Guide.

A Photographic Guide to the Birds of Peninsular Malaysia and Singapore (1993).

Birds of South-east Asia: A Photographic Guide (1998).

A Photographic Guide to the Birds of Southeast Asia (2000).

A Photographic Guide to the Birds of Indonesia (2001).

A Photographic Guide to Mammals of South-east Asia.

A Photographic Guide to Birds of Borneo.

A Photographic Guide to Snakes & other Reptiles of Australia.

A Photographic Guide to Trees of New Zealand.

The Deep Photographic Guide to the Constellations.