The Calverly Chronicles: The Strategy of Athena [Book One] Twins, Leo and Luca Calverly, are dragged into the demigod world of the usual ruckus, havoc, and destruction. Now, things aren't going too smoothly for the Olympians, and they, once again, need halfblood help. With Hecate kidnapped, and Athena quiet, the two might be the last hope for Camp Half-Blood to prevent a war between the gods. "Remember the date: October 16th. Be prepared. It is the day the world will experience the most pain and destruction it has ever faced before. Be prepared, halfbloods."