I have a broad spectrum of approach and use everything to get the best price. I use Libby which doesn’t always have the books I want but it’s useful. I use Chirp for deals. I use Apple because they sometimes have books I’m looking for at little cost. Audible is my usual though. I buy extra credits but often the book I want has a price lower than the cost of a credit. I just bought something for $3 instead of using an $11 credit.
I have a promise from my family to destroy them.