This purpose of this application is for users to review books.
When I visit a book show page, I see the book title and a list of reviews for that book, including the body and the user that created that review. I also see the rating (1-5; you do not need to validate that this falls within this range) that the user gave the book.
When I visit the book show page, I see the average rating for that book.
When I visit the book show page, I see a header that includes the highest rating for that book (e.g "Highest Rating: 4").
When I visit the book show page, I see a header that includes the lowest rating for that book (e.g "Lowest Rating: 1").
When I visit the book show page, under the header for highest rating, I see the body of that review and the name of the reviewer that submitted that review.
When I visit the book show page, under the header for lowest rating, I see the body of that review and the name of the reviewer that submitted that review.
You do not need to create a form for a review or implement current user