knopf

The most comprehensive field guide available to the flora and fauna of Florida--a portable, essential companion for visitors and residents alike--f...

The most comprehensive field guide available to the insects and spiders of North America--a must-have for any enthusiast's day pack or home library...

The most comprehensive field guide available to New England--a portable, essential companion for visitors and residents alike--from the go-to refer...

Virtually every bird found in eastern North America is brought to life in this portable guide, an essential companion in the field and a staple in ...

Virtually every bird found in western North America is brought to life in this portable guide, an essential companion in the field and a staple in ...

A portable, comprehensive field guide to over 650 species of trees in the western region of North America —from the National Audubon Society, the g...

This fully revised edition brings a new level of beauty, accuracy, and usefulness to the field guide that wildflower enthusiasts have relied upon...

This fully revised edition brings a new level of beauty, accuracy, and usefulness to the field guide that wildflower enthusiasts have relied upon...

Perfect for mountain climbers, hikers, and geology enthusiasts, this valuable reference covers more rocks and minerals in North America than any ot...

The most comprehensive field guide available to North American seashells--a must-have for any enthusiast's day pack or home library--from the go-to...

The most comprehensive field guide available to the Mid-Atlantic region of the United States--a portable, essential companion for visitors and resi...

The most comprehensive field guide available to the fabulous mysteries above--a must-have for any enthusiast's day pack or home library--from the g...

The most comprehensive field guide available to the Rocky Mountain region--a portable, essential companion for visitors and residents alike--from t...

Incredibly comprehensive yet portable enough for your day pack, the definitive field guide to every type of weather system, cloud formation, and at...

The most comprehensive field guide available to the Mid-Atlantic region of the United States--a portable, essential companion for visitors and resi...

A portable, comprehensive field guide to over 650 species of trees in the western region of North America —from the National Audubon Society, the g...

The most comprehensive field guide available to the flora and fauna of California--a portable, essential companion for visitors and residents alike...

The most comprehensive field guide available to the reptiles and amphibians of North America--a must-have for any enthusiast's day pack or home lib...

The most comprehensive field guide available to tropical marine fishes--a must-have for any enthusiast's suitcase or home library--from the go-to r...

The birds, mammals, reptiles and insects of Africa--a continent unparalleled in its ecological richness--are brought to life in this authoritative,...

The most comprehensive field guide available to North American mammals--a must-have for any enthusiast's day pack or home library--from the go-to r...

The most comprehensive field guide available to the wonders of the North American seashore--a must-have for any enthusiast's day pack or home libra...

The most comprehensive field guide available to North American mushrooms—a must-have for any enthusiast's day pack or home library—from the go-to r...

The most comprehensive field guide available to over 650 species of trees in North America’s eastern region—a must-have for any enthusiast’s day pa...