The right font can make your book look much better. Here are some characteristics of a good font choice:
A font you can use for both print and digital versions.
A ‘pro’ font with a wide variety of weights including less-than-bold Semibold and more-than-bold Black.
A font available in matching serif versions (for the body text) and sans serif (for headlines).
Toss in that the font is free and open source and you have a new font family available from Adobe called Source.
You can find more details here:
Here’s a source for the body text version:
Standardizing on a well-designed font family can make your book look good and appear consistent from version to version. Particularly when you’re an independent writer who is self-publishing, it helps to do all you can to look like a pro.
–Michael W. Perry, Inkling Books