Create the Perfect Fit Sewing and Fitting Book by Joi Mahon. From book back:

In Create the Perfect Fit, Joi Mahon debunks traditional fitting rules and shares her measure yourself, measure your pattern style of fitting to help you achieve the best possible fit. With detailed instructions and illustrations, she'll walk you through the process of measuring your body, applying your measurements to a commercial pattern and creating an exact main that will become the base for any future pattern you see. Learn how one pattern of any size can be adjusted to fit any body type. 

Great fitting book with a different approach to fitting.  Lots of useful information.