Determined to bury Excalibur, Jess and Duncan soon start to realize that they're being followed. Something is determined to catch up to them, even if that means burning reality itself and devouring everything in its path. For Duncan, however, the past is finally impossible to ignore. Not only does he have to face the truth about Anna, he also realizes that his master is growing stronger. With the Ancient Wolf preparing to make a comeback, Duncan realizes that he's being drawn toward a fate that's far worse than death. Destiny of the Last Wolf is the fourth book in the ongoing Lupine Howl series, which began in 2012. The book ends on a cliffhanger.