Conservationists

The Story of My Boyhood And Youth

John Reid Muir

Unbowed: a memoir

Wangari Muta Maathai.

Travels in Alaska

John Reid Muir

My pride and Joy

George Adamson.

A zoo in my luggage

Gerald Durrell ; with illustrations by Ralph Thompson

John Muir: My Life With Nature (Sharing Nature With Children Book)

John Reid Muir, Joseph Cornell

Finding the Mother Tree: Discovering the Wisdom of the Forest

Suzanne Simard

Gerald Durrell: The Authorized Biography

Douglas Botting

The elephant whisperer: my life with the herd in the African wild

Lawrence Anthony with Graham Spence

Eco barons: the dreamers, schemers, and millionaires who are saving our planet

Edward Humes.