A light hearted look at how calculus is relevant to society in a variety of contexts, the Calculus diaries is not intended to be a calculus text book. So do not expect lots of equations and solutions to your maths coursework! Rather the purpose is to introduce readers unfamiliar with calculus, encourage those who may have avoided it , and reassure people studying calculus of it's utility and wide scope. I feel this is achieved in an entertaining manner throughout, through the use of plenty of anecdotes and history of science facts.