Who wins?
The Battle of the Labyrinth vs The Last Olympian
The Last Olympian wins 100% to 0%. 11 more put them in the same row. From Percy Jackson Books Tier List. Pick a side.
silent_noodle_1990 on The Battle of the Labyrinth: the most underrated book in the series
DarkTaco3262 on The Last Olympian: the best finale in YA fiction, Luke's ending got me at 14
Percy Jackson Books Tier List: the full ranking