If you leave a new review for either Viper or Sentinel on Amazon.com, or if you left a review for either book in the past, you can enter for a chance to win a $25 Amazon.com gift card!

To enter:

    1. Write an honest review for either on Viper or Sentinel Amazon.com

Review Viper
Review Sentinel


  1. Leave a comment below with the username associated with your Amazon review


The winner will be randomly selected from all valid entries on April 14, 2017. Thanks so much for your honest thoughts, and good luck! 🙂