Goodreads Developers discussion

I'm an Objective C programmer but am new to goodreads. I have an iOS app and I am adding goodreads api functionality. I have successfully incorporated Authors and series. I would like to add book reviews. I expected an xml return from book.show; however, in looking at the results I see only links to other sites or callbacks. Can you direct me to an api call that will return reviews for a book given the ISBN or goodreads ID?

We've had to put in some authorization to prevent some inappropriate use of our users' review content, so you don't get access to review text by default. So none of the APIs will allow access to those data. It appears some of our documentation may be out of date, apologies.