Hades by Larissa Ione

A fallen angel with a mean streak and a mohawk, Hades has spent thousands of years serving as Jailor of the Underworld. The souls he guards are as evil as they come, but few dare to cross him. All of that changes when a sexy fallen angel infiltrates his prison and unintentionally starts a riot. It’s easy enough to quell an uprising, but for the first time, Hades is torn between delivering justice — bestowing or mercy — on the beautiful female who could be his salvation…or his undoing.

Thanks to her unwitting participation in another angel’s plot to start Armageddon, Cataclysm was kicked out of Heaven and is now a fallen angel in service of Hades’s boss, Azagoth. All she wants is to redeem herself and get back where she belongs. But when she gets trapped in Hades’s prison domain with only the cocky but irresistible Hades to help her, Cat finds that where she belongs might be in the place she least expected…