Evaline Stoker and Mina Holmes never meant to get into the family business. But when you’re the sister of Bram and the niece of Sherlock, vampire hunting and mystery solving are in your blood. And when two society girls go missing, there’s no one more qualified to investigate. Now fierce Evaline and logical Mina must resolve their rivalry, navigate the advances of not just one but three mysterious gentlemen, and solve murder with only one clue: a strange Egyptian scarab. The stakes are high. If Stoker and Holmes don’t unravel why the belles of London society are in such danger, they’ll become the next victims.

After the Affair of the Clockwork Scarab, Evaline Stoker and Mina Holmes are eager to help Princess Alix with a new case. Seventeen-year-old Willa Aston is obsessed with spiritual mediums, convinced she is speaking with her mother from beyond the grave. What seems like a case of spiritualist fraud quickly devolves into something far more menacing: someone is trying to make Willa "appear lunatic," using an innocent-looking spiritglass to control her. The list of clues piles up: an unexpected murder, a gang of pickpockets, and the return of vampires to London. But are these events connected? As Uncle Sherlock would say, "there are no coincidences." It will take all of Mina's wit and Evaline's muscle to keep London's sinister underground at bay.

And then she mouthed a word at me—an unmistakable word that told me everything I needed to know. “Checkmate.” Evaline Stoker & Mina Holmes have reluctantly agreed to act as social chaperones and undercover bodyguards for Princess Lurelia of Betrovia, who has arrived in London to deliver a letter that details the secret location of an ancient chess queen that’s been missing for centuries. But when the letter—which will heal a centuries-old rift between England and the Betrovians—is stolen out from under Evaline and Mina’s watchful eyes, the two girls are forced into a high-stakes race to ensure they find the chess queen before anyone else does…including their foe, the Ankh. For the chess queen is not only a historic symbol of a woman’s political power, but it has literal power as well—the queen will unlock the chessboard, revealing both treasures and ancient secrets the Ankh would kill to possess. It will take Mina’s smarts and Evaline’s strength to beat the thief and untangle this mystery before it is too late.

Ever since the debacle of the Chess Queen Enigma, Mina Holmes and Evaline Stoker have laid low, trying to settle back into their quiet lives as young ladies of London. But the Holmesian deductive abilities won't remain dormant for long, and when Mina receives a strange package from a winged, midnight visitor, she is catapulted into a new, dangerous adventure: the search for The Carnelian Crow. Meanwhile, Evaline has received some very disturbing news—news that will change her life forever. Along with that unpleasant knowledge is the strange disappearance of her nemesis, the disreputable pickpocket Pix. When it becomes clear the arch-villainess the Ankh has made her next move, it will take all of Mina's Holmesian ingenuity and Evaline's courage and determination to stop the criminal from executing her boldest and most dangerous plan yet!

Mina Holmes and Evaline Stoker return in their final and most exciting adventure together. Will the Ankh be brought to justice? What will happen now that we know Pix’s real identity? And what about Dylan? . . . And Grayling? And what is that strange and mysterious airship that flies over London?