The Joshua Files: Ice Shock

Though he knows about the secret Mayan prophesy that his father and
grandfather were a part of, Josh still hasn't solved the mystery
surrounding his father's death. But when Josh learns that a special
artifact, the Bracelet of Itzamna, is the key to both that and the
mystery of the codex, he must return to the hidden city of Ek Naab.
Only this time he must do it alone-because as the stakes rise, Josh can
no longer trust even his closest allies.

This second installment of the action-packed Joshua Files series
brings readers back to the secret world of the Mayan civilization,
where the mysterious 2012 prophecy still threatens the world. Does Josh
have what it takes to make it out alive once again?