Sounds like a good enough reason to test higher prices even for the short book. Some percentage of people will always complain about cost, but I (and many other

Sounds like a good enough reason to test higher prices even for the short book. Some percentage of people will always complain about cost, but I (and many others) have found that you actually get more of those complaints at lower price points. At a certain threshold price: the people buying already see the value in it no matter the length, or they see the value of their time as so high that taking the time to request a refund actually has a low ROI.