Bookshelf -- Calculus: An Historical Approach by William McGowen Priestley

When I first made the transition from the humanities to the sciences, I started a long and often discouraging search for books that were well written enough to stand alone rather than simply provide a set of examples and problems for a class.

Priestley's Calculus was one of the best books I came across.

Calculus: An Historical Approach by William McGowen Priestley