The primary form of communication on the web is through text which makes typography one of the most important aspects to design for. The Elements of Typographic Style will help you create designs that help your users quickly parse the text on the page, understand their relations, and understand your site better.
Pro Covers the history of typography
Throughout the book, typographic practices are explained along with their historical significance. Many terms and practices in typography are steeped in history, and learning it helps understand both the rationale, and significance of their adoption, and as a result, what role they play in modern typography.