When you go to "My Books" and select your book you will see the status of your bounties. You will be able to see each of your live Review Bounties in the Bounty Library and can cancel the Review Bounty should you need to.

Suppose you need to change a Review Bounty on a book. No worries! Just hit the Cancel Bounty button, and we’ll take care of everything. Your points will bounce right back, ready for you to make a new Review Bounty!