If you're new to reviewing on iBooks, follow these steps to leave your review on their website and prove to Booksprout that you've completed your review.
NOTE: You will need an Apple device to complete a review on iBooks. The following steps apply to iPhones, iPods, and any other IOS devices.
Click on the "Leave Your Review" button just under the iBooks heading. It should take you directly to the book's review page where you can leave your review.
On IOS devices, you might be asked to open this page in iBooks. If so, click "Open."
The book should now open in iBooks. Click on "Reviews" then "Write a Review"
Fill out the form to complete your review and click "Send"
Once your review is live on iBooks, come back to Booksprout and click the "Yes, I left my review" checkbox in the iBooks section.
Scroll down to the bottom and click the "save" button.