The following books about type might interest you:
 
Brady, Philip.
"Using Type Right: One Hundred Twenty-One No-Nonsense Rules for Working with Type."
NTC/Contemporary Publishing Company, 1994.
 
Bringhurst, Robert.
"The Elements of Typographic Style" second edition.
Vancouver: Hartley & Marks Publishers, 1996.
 
Brown, Alex.
"In Print: Text and Type in the Age of Desktop Publishing."
New York: Watson-Guptill, 1989.
 
Catich, Edward M.
"The Origin of the Serif: Brush Writing & Roman Letters," second edition.
Davenport, Iowa: Catich Gallery, St. Ambrose University, 1991.
 
Collier, David.
"Collier's Rules for Desktop Design and Typography."
Reading: Riverside Printing Co. Ltd, 1992.
 
Jean, George.
"Writing: The Story of Alphabets and Scripts."
New York: Harry N. Abrams, Inc., 1992.
 
McLean, Ruari.
"The Thames and Hudson Manual of Typography."
London: Thames and Hudson, 1988.
 
Parker, Roger C.
"Looking Good in Print," fifth edition.
The Coriolis Group, 2000.
 
Rgener, Stefan, Albert-Jan Pool, and Ursula Packhäuser.
"Branding with Type: How Type Sells."
San Jose: Adobe Press, 1995.
 
Spiekermann, Erik, and E.M. Ginger.
"Stop Stealing Sheep & Find Out How Type Works," second edition.
San Jose: Adobe Press, 2000.
 
White, Jan V.
"Graphic Design for the Electronic Age."
New York: Watson-Guptill, 1988.
 
Will-Harris, Daniel.
"TypeStyle: How to Choose and Use Type on a Personal Computer."
Berkeley: Peachpit Press, Inc., 1990.