This review is part my series on Progress in Mathematics. The posts aren’t linearly connected but if you’re interested you can read the first two here and here Number is a book about the history of mathematics. It was written in the 1930s by mathematician and part time lumberjack: Tobias Dantzig. It is a birds-eye view of the most important developments in the field from humanity’s first insights to what Dantzig knew as modern mathematics in the early 20th century. Dantzig spiritedly carries the reader along continuous threads of mathematical thought which stretch from the ancient Greeks, through the Renaissance, and into his modern day.