The Notebook (手帳 Techō) is the comprehensive bible for the player's in-game reference. Introduced in the Kiseki Series, the feature occurs through every Kiseki game as a note-recording method, and as an achievement bonus for PSN Trophies starting from the Evolution Remakes.
- Bracer Notebook, the bracer's handbook Estelle uses throughout the Trails in the Sky trilogy
- Police Handbook, the police inspector's guidebook Lloyd uses throughout the Zero/Ao no Kiseki duology
- Student Notebook, the Thors Military Academy student's handbook Rean uses throughout the Trails in Cold Steel trilogy