The advertisement included 2 chapters and the app to finish the book. I enjoyed it so I downloaded the app not realizing you can only read 1 chapter every 6 HOURS or PAY a ridiculous amount to finish! I would have never fooled with such nonsense. There's waaay too many free apps and downloads out there for this to be a thing; Robin Reads and others send a daily email for free and discounted books, plus Amazon offers a daily free selection NOT including Prime Unlimited. $10 annually; MAYBE.