Almost, DK. The free book should attract reviews. The reviews should encourage readers to check out your other books, which should be already listed on KDP so that they can read the free book and then, hopefully, buy one of the priced ebooks.
Good luck with this, Don! I see that your book is climbing up the rankings. It should make it into the top one hundred free books and rise up to the top 20-30 free downloads. It might stay in the top hundred for a few days and then slowly drop down the rankings. Keep us informed with how it goes.