What to do next?

We're back home on the boat and life is slowly returning to what we, at least, think of as normal.  We have rested from our two-month trip and from the frantic pace set during the last two weeks of visiting grandchildren.  We've taken care of the small irritations of a boat which sat idle in tropical salt water for two months while we were in the States, and I'm running out of excuses to avoid working on the next book.  
I have the opposite of writer's block -- too many ideas, and conflicting feedback from the marketplace.  ''Dungda  de Islan'," the non-fiction book released in June, has sold more copies in one month than my novel, "Deception in Savannah," has sold in six months.  I was planning to write another novel, and in fact have two in process, but, I must confess, I like to see sales numbers climbing.  I also have the notes for two more short, non-fiction books, so I'm in a quandary.  Do I chase the numbers, or stick to my plan? 
While I puzzle over that, I think I will write a short story about Donald, one of my favorite characters from ''Deception in Savannah." How's that for avoiding a decision?