NEW YORK TIMES BESTSELLER - "A beautifully written, extraordinary quest in which two ordinary, overlooked women embark on an unlikely scientific expedition to the South Seas."--Helen Simonson, author of Major Pettigrew's Last Stand WINNER OF THE WILBUR SMITH ADVENTURE WRITING PRIZE - From the bestselling author of The Unlikely Pilgrimage of Harold Fry comes an uplifting, irresistible novel about two women on a...