User blog comment:Percy Jackson12/The Seven/@comment-1868175-20111018214922/@comment-1868175-20111018231157

By reborn, I mean he stays the same age as the Last Olympian before his death. So, pretty much, Kronos still has taken over Luke, and thus, like Zeus took pity on Thalia, Hermes possibly would take pity on Luke, giving him a rebirth for a month.

Also, about Nico and Thalia being out and the no offense thing, none taken at all. And, I only know so much about the Heroes of Olympus series, so IDK who Frank is that much.