If BookBaby is designing/formatting your manuscript, we typically use one of our standard body fonts. These body fonts have been chosen for their clarity, readability, and friendly professional style. The point size the designers use is between 9-12pts.
If you would like to suggest a font or point size for your book, you may do so in the design questionnaire. The designer will do his/her best to meet your request.
If you are designing/formatting your manuscript yourself, you may use any font or point size available in your formatting software.