Bipolar Child is an excellent book, I see y'all have read that, the Dr. Papoulos (sp?) is an excellent psychiatrist, and has an older book out, that I have listed, though in the title depression may appear to be the main topic, it's really not, there is more info about Bipolar disorder,etc.
I have a feeling your grandson's pdoc, will take the approach my pdoc, and former one suggested, which is treat the Bipolar first, then the ADD.
My oldest brother, was DXed at 15 with Bipolar-I, males are more likely (due to testosterone) to experience more of the violent type/manic episode vs females,but not all do.
During adolescence,with hormones running wild, fuels things more.
Lithium therapy has worked the best for my brother, who is now 59, still takes it and now lower doses than previous years, it's an excellent medication, has the longest track record, and for most, non-sedating.
I opted for it for a short time, when I was being too sedated with the commonly used med.,Depkote,but due to extreme depressive episodes vs the very mild hypomanic ones, my pdoc switched me over to Lamictal, and it's worked well, I do not even need any anti-depressants while using this med.
Right now,I admit that I have become depressed,due to some heavy duty stuff I dealing with my sickly mom who has dementia.
This Wed. I see my pdoc,for my med monitoring visit (one every 6-8 weeks) so I hope he can help give me a "pep talk", and sign me up with a talk therapist in the group on the other side of his group's offices. If he thinks temporarily adding an anti-depressant to my regimen, I'll even go with that, or if increase in my meds is needed, I'll go with that too, I hate this horrible feeling,pre-menopausal doesn't help. My pdoc believes once that phase is all over, I may not need meds any longer but, hey, if I do I'm for it vs feeling horrible,miserable, is not worth trying to avoid meds for this is not worth it.
I really need something/someone to vent/whine to about this funk I've been thrown, it is probably best I start talk therapy like in the past.
Enough about me,I apologize, I got side tracked, which I do often, ha!ha!
I am sending you and your family positive energies,wishes for patience, and healing. It can be a long rode,but keep the faith, things will work out. Also,if you wish, come back, let us know how things work out.
Take care now,
Rosanne