This book isn't the one to read if you're strictly reading it for research purposes--you'll find more scientifically-orientated articles on medscape--but I think I'd recommend it as the first book to run out and get if you're diagnosed.
He does a good job letting us know that there are differences in the types of medications prescibed for rapid cycling vs. "traditional" bipolar. And he gives us some accurate scales to describe the degree of mania or depression.
The case studies are very well chosen, and each person who reads this book should be able to find a bit of themselves contained therein.
Very important: The reading level is very light and it reads like a magazine. Sometimes, these bipolar books tend to go bipolar: Either they read like a medical journal, or they read like a romance novel. Miklowitz has found the happy medium.