@CloudyHowdy hey I'm sorry for the inconvenience.
please follow these steps.
Add my book to your reading list if you haven't.
And after that if you are still unable to gain access to my book.
Just delete my book from your Private Library not from the reading list.
And re-add it again. After that close the app or simply just log out and log in.
Hopefully this should work.
Let me know if still have problem accessing the book.