Hal’s diary.
Halcyon’s Diary is a diary that originally belonged to Halcyon Green before the son of Apollo gave it to Luke Castellan shortly before his death.
The Heroes of Olympus[]
The Demigod Diaries[]
The Diary of Luke Castellan[]
Hal offers Luke and Thalia Grace to read anything from his bookcase, he tells them to not read it. Later as they ready to take out the Leucrotae, Hal gives the son of Hermes his diary.
After the two escape the mansion and encounter Annabeth Chase and convince her to join them, Luke writes what happened earlier that day in the diary while standing guard over the girls as they sleep.
Trivia[]
- The Demigod Diaries is modeled after Hal’s diary.