Jo - Just curious - what do you anticipate H's response to your success will be? Not, of course, that you should in any way tone down your excitement to pacify him - but it strikes me that he's kind of in "failure" mode in his own life right now. (I've even wondered whether he doesn't hold so tightly to homeschooling the girls as a way to avoid really pursuing business success????) I guess I'm thinking that you want to ask yourself "will this get me closer to my goal" before you present this new info to him (whatever that goal is right now, whether it's reconciliation or just getting more custody of your kids). How you present it may be important.
I'm hoping, btw, that this book makes you filthy rich so you can hire phalanxes of attorneys to win you custody of your girls. I still think your exH is weird and abusive, the way he keeps the girls from you.