These books pick up after the Demonica series, the characters you know and love are also included in the LoD series. These Four Horsemen of the Apocalypse are Sexy, Snarky, and a Riot.
Also there is “Apocalypse: The Lords of Deliverance Compendium” (Lords of Deliverance 2.5) out as an Ebook , 76 pages long. It’s said you might want to read this before Lethal Rider to gain more insight on what’s going on. 🙂