Is this the book
Feeling Sad?
Source: When Someone You Love is Bipolar
Googlebooks has some more info as well:
When Someone You Love is Bipolar
I haven't yet purchased any books specifically related to bipolar disorder although amazon has plenty of options for me to choose from:
Bipolar Disorder.
I'll certainly consider getting this one but I also need to take a look at some of the other book recommendations. Much thanks for drawing attention to it.
~ Namaste