Interior Design
Here is a list op some good books, hopefully you can check most of them at Amazon.com From this list you can see if you have a particular sytle you like and get more books about that, ie French Country (my personal favorite) English Country, Traditional, Cottage, Contemporary, etc. These are not listed in a special order:
Christopher Lowell's Seven Layers of Design
Martha Stewart How to Decorate
Carole Talbot Decorating for Good
Cheryl Kimbal The Everything Home Decorating Book
Lynette Jennings No compromise Decorating
Glenna J Morton The Impatient Decorator
Lowe's Complete Home Decorating
Nina Campbell's Decorating Notebook
House Beautiful Decorating Style
Susie Coelho's Everyday Styling
Hope these help I am sure you will find a couple, happy decorating.