One Piece Green: Secret Pieces

One Piece Green: Secret Pieces is the fourth Databook.

Content
Contents include:


 * Names and sketches of Whitebeard's Allies.
 * Holds the combined full stories from the cover story arcs.
 * Reveals sections of Oda's sketchbook and early One Piece.
 * Origins of characters' naming.
 * A few Mugiwara Theatre stories.
 * A new subdivision of the first half of One Piece manga in sagas is given:
 * Dawn of the Adventure Saga (Chapters 001-095)
 * Grand Line Challenge Saga (Chapters 096-216)
 * Gold Land of Sky Saga (Chapters 217-318)
 * Strawhat Pirates vs. World Government Arc (Chapters 319-441)
 * Ghost Island Adventure Saga (Chapters 442-513)
 * Intrusion! The big prison Saga (Chapters 513-550)
 * History Greatest Summit War Saga (Chapters 550-597)
 * ​Curiosly, the chapter 550 is given as divided up between the 6th and the 7th saga
 * The subdivision is different with the manga official site's one.