If you would like to know more about typography, you could do a lot worse than read these excellent books on the subject by people far more intelligent and coherent than I. Please remember to support your local independent book store.
The Elements of Typographic Style
by Robert Bringhurst, ISBN: 0881791326
An Essay on Typography
by Eric Gill, ISBN: 0853315094
A Short History of the Printed Word
by Warren Chappell, ISBN: 0881791547
Manual of Typography
by Ruari McLean, ISBN: 0500680221
Stop Stealing Sheep (and find out how type works)
by Erik Spiekermann, ISBN: 0201703394
About Face: Reviving the rules of typography
by David Jury, ISBN: 28804667776