I am running some test ads on my new book devotional set and so far 50% of people want the full set and 50% of people want the half set. So now I don't know what to do. I'll have to run another test. Also, I'm rebranding all of the stuff here according to what people have told me they wanted, so to make everything much easier for you all.
I list my books on Amazon at full retail. That way, I can sell them at a discount on my website, and it gives people a reason to pull the trigger and buy it now.
@Belle Gayer Lulu press is a printing and fulfillment company like amazon but you can sell off your own site. That way you can sell book sets without ever having to buy the books first