• Camp Jupiter Classified

  • A Probatio's Journal (The Trials of Apollo)
  • By: Rick Riordan
  • Narrated by: Erin Cahill
  • Length: 1 hr and 31 mins
  • 4.6 out of 5 stars (222 ratings)

Prime logo Prime members: New to Audible?
Get 2 free audiobooks during trial.
Pick 1 audiobook a month from our unmatched collection.
Listen all you want to thousands of included audiobooks, Originals, and podcasts.
Access exclusive sales and deals.
Premium Plus auto-renews for $14.95/mo after 30 days. Cancel anytime.
Camp Jupiter Classified  By  cover art

Camp Jupiter Classified

By: Rick Riordan
Narrated by: Erin Cahill
Try for $0.00

$14.95/month after 30 days. Cancel anytime.

Buy for $13.50

Buy for $13.50

Pay using card ending in
By confirming your purchase, you agree to Audible's Conditions of Use and Amazon's Privacy Notice. Taxes where applicable.

Publisher's summary

In this companion book to Rick Riordan's best-selling Trials of Apollo series, bizarre things are happening throughout Camp Jupiter. To find out why, listeners can hear the pages of this camper's journal, which reveals the secrets of the Roman demigods' training ground.

It's the February after Gaea's defeat, and mysterious incidents are wreaking havoc throughout Camp Jupiter. If the Romans don't figure out who - or what - is behind the episodes soon, the Twelfth Legion could implode.

Suspicion falls on Claudia, the Fourth Cohort's newest probatio. After all, the mischief started shortly after she stumbled into camp. Plus, she's a daughter of Mercury, the god of thieves and tricksters.

To find out whether she's guilty or innocent, listeners can delve into the pages of Claudia's personal journal. Through her eyewitness accounts, they will visit the crime scenes - a row of seats in the Coliseum, an underground aqueduct tunnel, the strange staircase at the back of the principia - and see the bizarre events unfold. They'll be right alongside Claudia when she discovers a secret so ancient that not even the lares know about it...a secret that holds the key to Camp Jupiter's safety.

©2020 Rick Riordan (P)2020 Listening Library

Featured Article: Percy Jackson—A Percy Jackson and the Olympians Character Guide


Percy Jackson is the eponymous hero of the best-selling Percy Jackson and the Olympians series by Rick Riordan. He made his debut in The Lightning Thief at just 12 years old, where he discovered the shocking truth about his parentage: He is a demigod, the son of a mortal woman and the god Poseidon. Beyond his own series, he was one of the protagonists in the Heroes of Olympus series and has since appeared in other spin-off novels and series from Riordan.