Chiron insisted that we talk about the Labyrinth in the morning which is like 'Hey, your life's in mortal danger. Sleep tight!
You deal with mythological stuff for a few years, you learn that paradises are usually places where you get killed.
Now, as far as I knew, he (Luke) was still sailing around on his demon-infested cruise ship while the chopped-up Lord Kronos re-formed, bit by bit, in a golden sarcophagus, biding his time until he had enough power to challenge the Olympian gods. In demigod-speak, we call this a “problem.” - Percy, 'The Battle of the Labyrinth