Often it is said that the final book that can either make or break a series, but I’m thrilled to report that The Infernal Battalion is a finale that exceeded my expectations, bringing about a stunning conclusion to The Shadow Campaigns. As this is a review for the fifth and final installment of the series, the usual caveats apply: beware of possible spoilers for the previous books, if you are not already caught up. A great deal has happened to bring us to this point, including the escape of the Beast—the demon of all demons, and a force of unspeakable evil—from its ancient prison beneath Elysium. Its influence spreads the way it feeds, absorbing the minds and controlling the bodies of all those it infects. Now it has amassed an unstoppable army of these drone-like soldiers, and at the head of this infernal host is none other than General Janus bet Vhalnich, whose faculties the Beast had stolen at the end of The Guns of Empire. But to those who are unaware of Janus’s possession, his actions seemed like the worst kind of betrayal. Vordan has only just emerged from a bloody war, and Queen Raesinia had been looking forward…