^^Go to the website for Fairchild Publications -- Google it -- I dont exactly remember the address.
There is a list with descriptions of any kind of instructional fashion book you could think of.
For Business..look at the The Business of Fashion. Its a Purple book. The students at parsons and fit use it.
There is also a book I read called "Beyond Design" Its a good overview of apparel production process. Fairchild has it.
I've listed Patternmaking and Draping already in my earlier post.
The fairchild website should have illustration books, 9Heads is a good one, also The Fashion Sketchbook by Bina Abling (well any of her books are good), also Steven Stiplemans book.
Those are instructional -- but anyone who likes to look at fashion illustration might enjoy the WWD Fashion Illustration book -- came out last year. I think its called 50 years of Fashion Illustration, or something like that.
Fairchild also has CAD books...any will be fine. Fashion uses primarily photoshop, illustrator, (Adobe)larger companies use Primavision, U4ia, Karat. Gerber for patternmaking.
For Menswear do a search here on tfs...Clay referred me to a patternmaking book for menswear a few months ago, which I bought but havent read yet.
For Marketing -- see the Purple book (the Business of Fashion).
Also you didnt ask for couture techniques -- but Claire Schaeffer's book on Couture Sewing Techniques is good and applicable to any sewing.
Have fun, happy reading.
