
- “Outstanding. . . . A superb biographical rehabilitation of an indispensable natural scientist.” – Kirkus Review, starred review
- “[Costa] gives naturalist Alfred Russel Wallace the biography he deserves in this definitive account. . . . Comprehensive and revelatory, this is a first-rate take on an overlooked figure in scientific history.” – Publishers Weekly
- “Radical by Nature uncovers fresh details about a remarkable, idiosyncratic scientist and social activist, showing how humans’ understanding of the world was fundamentally altered by his ideas.” – Foreword Reviews, starred review