There have been times when I've pondered putting The Inventor's Son Series into Kindle Unlimited on Amazon. This would require me to remove them from Barnes & Noble, Kobo, iBooks, Google Play Books, and other places where eBook readers can get my books. It is based on the sales of my books on those other sites, along with the problems that Amazon seems to be having with the Kindle Unlimited program, that makes me think twice about it and leave things as they are.
I wonder about a few things:
1) How many Kindle Unlimited subscribers there really are.
2) How many of my potential readers would have liked to read my books but they were members of Kindle Unlimited and can't access my books through that program at present.
3) How much more visibility my series might have on Amazon if they were in the program.
4) How quickly Amazon can tackle the problems they are facing with a declining reader experience and loads of books in the program that do not belong there (for more on this topic, please read this excellent post about the kind of trouble going on with Amazon lately).
What do you think? Would I be better serving my readers by enrolling my books into KDP Select, and making them available to Kindle Unlimited borrowing? Or would you rather borrow them through your local library (which could soon be possible through Overdrive) or through Scribd and 24Symbols, where the books are currently available? I'd love to know what you think!