End of 2004- Thalia becomes a tree This is a minor change since that means all three of them will be slightly older Annabeth 8, Thalia 13, Luke 16
Summer of 2008- The lightning thief
Summer of 2009- The Sea of monsters
Winter of 2009- The Titan's curse
Summer of 2010- The Battle of the Labrinth
Summer of 2011- The Last Olympian