Under Clock and Key — Sara C. Roethle

In this third installment of the Thief's Apprentice Series, Arhyen finally finds the information he's been searching for. Unfortunately, he has no one to tell it to. He has no idea what's become of Liliana, or even if she still lives. If she has met her untimely end, or worse, if she's been taken prisoner by those who've entrapped him, there's no one left to ride to the rescue. As the reaper's scythe looms near, Arhyen must find a way out. If not for himself, then for London, and the thousands of victims soon to come.