I know someone who’s going to be very excited to hear this news from Rick Riordan:

As a Valentine’s Day treat for my fans, I’m announcing a new short story, “The Staff of Serapis,” that will appear in the paperback of THE MARK OF ATHENA, publishing onApril 8. In this adventure, Annabeth encounters more oddities in the subway than usual, including a two-headed monster and a younger blond girl who reminds her a little of herself. . . .

Yes, folks, this is the story you’ve asked for, in which Annabeth Chase teams up with Sadie Kane. Dang, it was fun to write the dialogue between those two! This story is a follow-up to “The Son of Sobek,” in which Carter met Percy. Staff of Serapis is even longer, sixty pages, and I hope you like it as much as I enjoyed writing it.

Here’s an excerpt to whet your appetite!