Annihilation Plan (Mars Wars Book 3) now available, and an audio sample April 14, 2022 johnandrewkarr 2 Comments The audio version of Annihilation Plan (Mars Wars Book 3) is close to release now available. I’ve got a few free promo codes to give away. Leave a comment and I’ll send while supplies last. Free Audio Book Codes has those free promo codes. Here is an audio sample.