Why did Peter L. Robertson think he had the “biggest little invention of the twentieth century”?How did a quest to improve the precision of the screw result in Captain Cook’s voyages of discovery? And how did Witold Rybczynski discover the true origins of the screwdriver in an obscure15th-century tome known as the Medieval Housebook, despite historians’ claims that it had not been invented until three centuries later?In a narrative that reads like a satisfying detective story