add a post to a category without adding the category

Is there a way to add a post to a category page without adding the category in the post. For example i have a category for a certain author and have all her books as post in the category page but then i have review post for the author but i don’t want to add it to the category because i don’t want it to be added to the list and review post page is setup differently from the rest of the post page setup. So is there a way to do this with tags or a plugin, or subcategories(least desirable becuase i would have to change each one of the post page code so it would look like the review page).