Ashton "Frosty" Martin is both elated and despondent when his dead girlfriend Kat comes back as a Witness just like Ali Bell's sister Emma (who has helped Ali and friends throughout the series).
Ashton 'Frosty' Martin is both elated and despondent when his dead girlfriend Kat comes back as a Witness. She has a task for Frosty; help a fellow slayer and save him before it is too late. The slayer he finds, Milla Marks is the last person he wants to help, as she is sister of neighbouring zombie crew leader and caused Kat's death. This task won't be easy, but Frosty never liked doing anything the easy way. The 4th book in the series.