Hey, Xavid! Thanks for asking; I should probably include that in the bundle information above, huh? In order:
The Sun's Court:ship is a 110-page document, featuring eight Miraculous characters (each with a basic quest, side quest, and introductory 3-quest Arc), HG advice, and a handful of potential locations for the characters to visit.
The Marvelous Airship is a shorter 22-page document, featuring the airship itself, a handful of NPCs and locations, some HG advice (including building Laodemus Schwan as a party NPC) and three quest.
To Boldy Go is a 64-page document with six non-Miraculous characters (each with a basic quest, side quest, and introductory 3-quest Arc), HG Advice, and setting information.