Sorry it wasn't so good.
"Good" is relative and I didn't have big hopes for my international BB since this BB was only seven months after the prior one. It takes a while for a reader to read a long novel, too, so reaching out for the others might come next week, not this week. Also, although BB says make the book discounted for a short period of time, to cover myself with Amazon and given the holidays, I've still got my title discounted until 1/10. So I don't feel I have the full stats yet, just the basic outlines. I know it made a profit, but the question is how much profit?
When I bring out the fourth book in this not-a-series series, then I'll have a similar quandary to yours. Advertise the first book about these families, or just advertise the last one? Or one of the in-between titles?