The Undertakers #2: Queen of the Dead by Ty Drago

My name is Helene, and the Corpses have a new leader. This woman also wants to destroy all humans, but we can't figure out how she plans to do it. She had her Deaders capture an FBI agent, and he's being kept in the abandoned Eastern State Penitentiary. What do they want with him? The Chief decided we need to go on the offensive, so I'm on a rescue mission with Sharyn, Will, and the Burgermeister. However, things have gone terribly wrong. We've found the FBI agent, but Sharyn's been seriously injured. We don't know if the Chief's sister will survive, and we need to find a way out of the penitentiary. The Ritter is a new weapon that gives us a chance to actually kill Deaders, but will it be enough to safe humanity?

You should read the first book before reading this sequel. The summary above shares the gist of the plot, but details make the book more entertaining. Most humans can't see Corpses through their "Masks", but Undertakers are kids with the ability to see their true, undead form. Consequently, Deaders are able to exist among humans, and they hold many positions of power, including the police. The Undertakers use unique inventions made from common materials, and luckily, one of the kids is the son of a surgeon. The book includes plenty of action, but the character interactions make it most interesting. Will's father founded the Undertakers and was the only adult able to see the Corpses. Will has a connection to a "guardian angel", although it's unclear where she comes from. She allows Will to ask one question per book, so the author provides crumbs about what's going on. There are still many unanswered questions, but the Ritter offers a hope for success. Some new characters are added to the series, so it will be interesting to see how that changes future events. Overall, I'm enjoying the series and recommend you give it a shot.