Use Case - Review

Submitted below is a use case,  "Review".
This use case highlights the need I see for a user to be able to search for annotations of a particular "persuasion"  (i.e. type/motivation) on a particular resource.  If I write a review of a book and people don't know how to find it, what good is it?
Ray

Review
Reviewers  submit  reviews of  resources --  books,  scholarly articles, etc.
A user wants to find reviews of a particular resource.
Example
Amy is trying to determine whether she wants to read the book Zookeeper's Wife by Ackerman; she would like to read reviews. There are many reviews - at Publishers Weekly, Goodreads, Amazon, New York Times, NPR, and various other web sites.  Amy would prefer to be able to gather a single list of reviews (with links), rather than going to various review sites individually to look for a review of the book.
If there is are mechanisms in place whereby

1.       whenever a review is written, the reviewer (or a third-party annotator) can create an annotation (saying "this review reviews this book") ;    and

2.       a user can search for all "review" annotations for a specific target;
then Amy can find reviews of Zookeeper's Wife -  at least those reviews for which Annotations have been created.