Journalist's decade-long, cross-continental hunt for origins of the feijoa

Kate Evans is an award-winning journalist and regular contributor to National Geographic, and she's also a self-proclaimed feijoa fanatic. But for the tangy and gritty fruit, New Zealand is not home - its origins are in South America. Over the course of a decade, Kate has spoken to scientists, historians, and horticulturalists worldwide, and visited four continents, to trace the feijoa right back to its Brazilian beginnings. Her new book - Feijoa: A Story of Obsession and Belonging - is part-science writing and part-personal memoir, and seeks to uncover why out of all places, New Zealand took in the fruit as its own.