In order to find reviews shared with a Community that you are part of, go to the People tab of your account. On the left side of the page, under People Options click on Your Communities, a list of your Communities will display on the right side of the page.
Find the Community with the book review you want to read and take a look on the right side of the community lane. The number in the blue circle is the number of Reviews that are available to view. Click on the number in the blue circle next to Reviews:
A window showing the books with reviews that have been shared with the Community will open up. To see the reviews for only those who are part of the community, click the small + sign next to the book cover. This expands the lane and you will then be able to see who in this community, reviewed it. To see the full text of the review, just click on the text portion under review. (See arrow below) To hide the reviews, click the minus sign.
You will then be taken to a new page to view it. Click on Peer Reviews and you will be able to see all of the shared reviews for that book, even from individuals who are not part of the community.