6 hours ago, Smithy said:
Strangely, for this Prime member this book is free. "Read it for free" it says, and when I clicked on it I was advised that it would appear in my library. I don't know what that means for the long term.
I've checked out a few free to read books in the past four years, and there are no return dates. You can borrow up to 10 books and, when you max out, you need to return one to check another out. Go to Kindle Store and type Prime Reading.