While the characters and concept of revival remain compelling, the plot of Lost Souls was significantly less exciting than Reviver. Most of the mysteries were resolved by the close of the previous novel, and the sequel didn't add enough new questions, or resolve the few things that had been left unanswered. I guess this isn't unreasonable for the second book in a trilogy, but this book felt like it just followed the pattern of the first book, making everything feel predictable.