Actually, being able to see all books by the author would be especially useful. And it's a view more particularly essential than it is for RT (since an author has a more singularly important role in the quality of a work, compared to the actors/studios/directors/writers/producers/financial backing that go behind a successful movie)...being able to see an average for an author's books, or even a sparkline (to see if he/she is going downhill) would add a lot of value with minimal effort.
Related to that: I know it's kind of important to people to see the blurb, which necessitates a multi-column layout for the listed reviews. But I'd rather see it in a tabular format, with Reviewer Name, Date, Rating, and then a long field for 20-30 word blurb. It's easier to see distribution of reviews in a tabular format.