Finding Fibonacci: The Quest to Rediscover the Forgotten Mathematical Genius Who Changed the World by Keith Devlin and the Man of Numbers: Fibonacci's Arithmetic Revolution by Keith Devlin PRINCETON: PRINCETON UNIVERSITY PRESS, 2017, 256 PP., US $29.95, I

**A compelling firsthand account of Keith Devlin's ten-year quest to tell Fibonacci's story** In 2000, Keith Devlin set out to research the life and legacy of the medieval mathematician Leonardo of Pisa, popularly known as Fibonacci, whose book __Liber abbaci__ has quite literally affected the lives of everyone alive today. Although he is most famous for the Fibonacci numbers—which, it so happens, he didn't invent—Fibonacci's greatest contribution was as an expositor of mathematical ideas at a level ordinary people could understand. In 1202, __Liber abbaci__—the "Book of Calculation"—introduced modern arithmetic to the Western world. Yet Fibonacci was long forgotten after his death, and it was not until the 1960s that his true achievements were finally recognized. __Finding Fibonacci__ is Devlin's compelling firsthand account of his ten-year quest to tell Fibonacci's story. Devlin, a math expositor himself, kept a diary of the undertaking, which he draws on here to describe the project's highs and lows, its false starts and disappointments, the tragedies and unexpected turns, some hilarious episodes, and the occasional lucky breaks. You will also meet the unique individuals Devlin encountered along the way, people who, each for their own reasons, became fascinated by Fibonacci, from the Yale professor who traced modern finance back to Fibonacci to the Italian historian who made the crucial archival discovery that brought together all the threads of Fibonacci's astonishing story. Fibonacci helped to revive the West as the cradle of science, technology, and commerce, yet he vanished from the pages of history. This is Devlin's search to find him. In 2000, Keith Devlin Set Out To Research The Life And Legacy Of The Medieval Mathematician Leonardo Of Pisa, Popularly Known As Fibonacci, Whose Book Liber Abbaci Has Quite Literally Affected The Lives Of Everyone Alive Today. Although He Is Most Famous For The Fibonacci Numbers--which, It So Happens, He Didn't Invent--fibonacci's Greatest Contribution Was As An Expositor Of Mathematical Ideas At A Level Ordinary People Could Understand. In 1202, Liber Abbaci--the Book Of Calculation--introduced Modern Arithmetic To The Western World. Yet Fibonacci Was Long Forgotten After His Death, And It Was Not Until The 1960s That His True Achievements Were Finally Recognized. Finding Fibonacci Is Devlin's Compelling Firsthand Account Of His Ten-year Quest To Tell Fibonacci's Story. Devlin, A Math Expositor Himself, Kept A Diary Of The Undertaking, Which He Draws On Here To Describe The Project's Highs And Lows, Its False Starts And Disappointments, The Tragedies And Unexpected Turns, Some Hilarious Episodes, And The Occasional Lucky Breaks. You Will Also Meet The Unique Individuals Devlin Encountered Along The Way, People Who, Each For Their Own Reasons, Became Fascinated By Fibonacci, From The Yale Professor Who Traced Modern Finance Back To Fibonacci To The Italian Historian Who Made The Crucial Archival Discovery That Brought Together All The Threads Of Fibonacci's Astonishing Story. Fibonacci Helped To Revive The West As The Cradle Of Science, Technology, And Commerce, Yet He Vanished From The Pages Of History. This Is Devlin's Search To Find Him. -- Back Cover. Sputnik And Calculus -- The Flood Plain -- The Manuscript -- First Steps -- The Statue -- A Walk Along The Pisan Riverbank -- A Very Boring Book? -- Franci -- Publishing Fibonacci: From The Cloister To Amazon.com -- Translation -- Reading Fibonacci -- Manuscript Hunting, Part I (failures) -- Manuscript Hunting, Part Ii (success At Last) -- The Missing Link -- This Will Change The World -- Leonardo And The Birth Of Modern Finance -- Reflections In A Medieval Mirror -- Guide To The Chapters Of Liber Abbaci. Keith Devlin. Includes Bibliographical References (pages 236-238) And Index. A compelling firsthand account of Keith Devlin's ten-year quest to tell Fibonacci's story In 2000, Keith Devlin set out to research the life and legacy of the medieval mathematician Leonardo of Pisa, popularly known as Fibonacci, whose book Liber abbaci has quite literally affected the lives of everyone alive today. Although he is most famous for the Fibonacci numbers - which, it so happens, he didn't invent - Fibonacci's greatest contribution was as an expositor of mathematical ideas at a level ordinary people could understand. In 1202, Liber abbaci - the "Book of Calculation" - introduced modern arithmetic to the Western world. Yet Fibonacci was long forgotten after his death, and it was not until the 1960s that his true achievements were finally recognized. Finding Fibonacci is Devlin's compelling firsthand account of his ten-year quest to tell Fibonacci's story. Devlin, a math expositor himself, kept a diary of the undertaking, which he draws on here to describe the project's highs and lows, its false starts and disappointments, the tragedies and unexpected turns, some hilarious episodes, and the occasional lucky breaks. You will also meet the unique individuals Devlin encountered along the way, people who, each for their own reasons, became fascinated by Fibonacci, from the Yale professor who traced modern finance back to Fibonacci to the Italian historian who made the crucial archival discovery that brought together all the threads of Fibonacci's astonishing story. Fibonacci helped to revive the West as the cradle of science, technology, and commerce, yet he vanished from the pages of history. This is Devlin's search to find him.