In the canton of Yarrowdale, at the very edge of the Empire's reach, an impossible crime has occurred. A Treasury officer has disappeared into thin air-somehow abducted from his quarters while the door and windows remained locked from the inside, in a building whose entrances and exits are all under constant guard. To solve the case, the Empire calls on its most brilliant and mercurial investigator, the great Ana Dolabra. At her side, as always, is her bemused assistant Dinios Kol. Before long, Ana's discovered that they're not investigating a disappearance, but a murder-and that the killing was just the first chess move by a thief who seems to be able to pass through warded doors like a ghost, and who can predict every one of Ana's moves as though they can see the future. Worse still, the killer seems to be targeting the high-security compound known as the Shroud. Here, the Empire's most brilliant minds dissect fallen Titans to harness the volatile magic found in their blood. Should it fall, the destruction will be terrible indeed--and the Empire itself will grind to a halt, robbed of the magic that allows its wheels of power to turn. Din has seen Ana solve impossible cases before. But this time, with the stakes higher than ever and Ana seemingly a step behind their adversary at every turn, he fears that his brilliant superior has met an enemy she can't defeat.

In Daretana’s most opulent mansion, a high Imperial officer lies dead—killed, to all appearances, when a tree spontaneously erupted from his body. Even in this canton at the borders of the Empire, where contagions abound and the blood of the Leviathans works strange magical changes, it’s a death at once terrifying and impossible. Called in to investigate this mystery is Ana Dolabra, an investigator whose reputation for brilliance is matched only by her eccentricities. At her side is her new assistant, Dinios Kol. Din is an engraver, magically altered to possess a perfect memory. His job is to observe and report, and act as his superior’s eyes and ears--quite literally, in this case, as among Ana’s quirks are her insistence on wearing a blindfold at all times, and her refusal to step outside the walls of her home. Din is most perplexed by Ana’s ravenous appetite for information and her mind’s frenzied leaps—not to mention her cheerful disregard for propriety and the apparent joy she takes in scandalizing her young counterpart. Yet as the case unfolds and Ana makes one startling deduction after the next, he finds it hard to deny that she is, indeed, the Empire’s greatest detective. As the two close in on a mastermind and uncover a scheme that threatens the safety of the Empire itself, Din realizes he’s barely begun to assemble the puzzle that is Ana Dolabra—and wonders how long he’ll be able to keep his own secrets safe from her piercing intellect. Featuring an unforgettable Holmes-and-Watson style pairing, a gloriously labyrinthine plot, and a haunting and wholly original fantasy world, The Tainted Cup brilliantly reinvents the classic mystery tale.