Book 143: The Last Olympian

The Last Olympian by Riordan is the final installment in the Percy Jackson series.  Poseidon is entrenched in his palace battling Oceanus.  Hades is refusing to help and has both Demeter and Persephone with him.  With the exception of Hestia, the rest of the Olympic gods are unsuccessfully trying to stop Typhon.  That leaves only the demigods, the hunters, and a few allies to defend Olympus when Kronos launches his final attack.  Great ending to a fantastic series. 5 stars.