These fonts could be ruining your emails.
Your email font affects its readability. Yip. If you’re using fonts like Helvetica and Arial, the defaults for email accounts like Apple Mail and Gmail, your emails might be harder to read than those written in Georgia or Verdana.
What makes these fonts so different? Read here.
I can recommend Just My Type by Andrew Garfield. Fascinating look at the development of typefaces and fonts and the intricacies of developing a new font. Well written and engaging. (He wrote a less interesting book called Mauve about the development of the first aniline dyes and their impact on industry.)