Fibonacci: How numbers helped shape the development of modern Western Europe

In 1202, life in western Europe was changed by the publication of Liber abbaci, a book by Leonardo of Pisa, known as Fibonacci, the first general-purpose book of arithmetic in the West, which "explained the 'new' methods in terms understandable to ordinary people."

The Man of Numbers, a new book by Keith Devlin, "reveals how a 13th-century tome on arithmetic has shaped modern finance and explains some mysteries of nature."