The Fourth Ruby

Jack and Gwen are back in this dynamic follow-up to The Lost Property Office.

It's been a year since Jack Buckles discovered the Keep beneath Baker Street, an underground tower no Section Thirteen was ever supposed to see; a year since his dad fell into a coma. Nothing has been the same since. Jack's tracker abilities are on the fritz, Gwen's not speaking to him and, what's worse, there's a pounding voice in his head calling for “the flame.”

Then, Jack and Gwen are framed for the theft of a ...