This is the reason people go to graphic design school and spend all that
time worrying about recognizing typefaces, the effects of leading, etc.
Your audience should determine the look of the book. Check out books at your
local bm bookstore--bricks and mortar, not Barnes and Noble, tho' they
The answer is This is Your decision really!
However, I can make some personal observations.
I bought this: http://www.amazon.com/gp/product/B00BFOYW4K/ref=docs-os-doi_0
quite a while back and found it a good read to understand how to make fonts in
documents look good. (The title is Type
