I really enjoy listening to this series it has great character development much action and in this book a lot of military action as well as zombies. The main characters are Sarah, Dougit, Leonard, Dr Sanjay, Nampo Yi, Kamal Baraghani and more. Leonard took something from the hospital Dr Sanjay was working on to find a cure of the zombies and all hell breaks loose as North Korea and Iran want it. It is a fast paced book taking place in Colorado. Highly recommend this series cannot wait for book A Road to Hell, keep them coming. . I was given this free review copy audiobook at my request and have voluntarily left this review. Thank you