There are many books out there that claim to have this or that advantage over other books on understanding and/or coping with your bipolarity and mood swings. It can be terribly confusing.
There is one that I have frequently used myself because it has good, straightforward advice as well as introductory explanations and descriptions. I have often recommended it to others and I know many bipolar-help groups also recommend it too.
I have provided a link to Amazon, but in case I have bungled the link, the book is called, 'The Bipolar Disorder Survival Guide- What you and your family need to know', Author: David J. Miklowitz, PhD.
Most of the books written by Kay Redfield-Jamison are good. If you are up to reading something slightly tangential to your own personal mood swings, and for a bit of erudite learning, (and heart warming fraternal belongingness to historical talented bipolar swingers) then there is Kay RJ's 'Touched With Fire' (Manic Depression and the Artistic Temperament). I believe this was her first book.
If you want to read a book on depression, then Andrew Solomon's ' The Noonday Demon - An Anatomy of Depression' is a little dated, but still a book I return to time and time again.
I have asked to be de-registered from this forum so if you have further questions, I should be able to answer them if you post them here or referring to FW, as I have some friends who are still members on the forum.
I do hope that you find the books useful. I certainly have found them to be so.
All the best,