Start gifting
Libro.fm for Business
Start a membership, get two free audiobooks
Almost ready!
In order to save audiobooks to your Wish List you must be signed in to your account.
Log in Create account
Limited-time offer
Get two free audiobooks when you make the switch!
Now’s a great time to shop indie. When you start a new membership supporting local bookstores with promo code SWITCH, we’ll give you two bonus audiobook credits at sign-up.
Make the switch
Gift audiobook credit bundles
You pick the number of credits, your recipient picks the audiobooks, and your local bookstore is supported by your purchase.
Start giftingThe Fourth Ruby
This audiobook uses AI narration.
We’re taking steps to make sure AI narration is transparent.
Learn moreJack 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 historic crown jewel—the Black Prince’s Ruby, one of three cursed rubies said to bring knowledge, loyalty, and the command of nations to whomever wields them all. Now, they must retrieve the other jewels before the true thief does, or risk unleashing a reign of terror unlike anything history’s ever seen.
James R. Hannibal is no stranger to deep dark secrets or hunting bad guys, having served in the US Air Force as a stealth bomber pilot and a Predator mission commander. Like Jack Buckles, James “suffers” from synesthesia, an intersection of the senses that was once considered a mental illness and often causes hyperobservance. If you bake him a cake, he might tell you that it smells blue and sticky—and you should take it as a compliment. You can learn more at TheLostPropertyOffice.com.