From interior description:
Introduction:
the purpose to building and exploring a maze
three styles for running a maze
“cheating” pros and cons
For the GMs (Chapters 1-3):
building a maze from the ground up
racial structures (i.e. a maze built by gnomes or dragons)
maze locations (underground, exterior)
maze components (corners, light, adjusting normal rules in a maze)
random maze generator
determining the Challenge Rating for a maze
adding Maze Templates to enhance any maze
new and common maze inhabitants
For the Players (Chapters 4-5):
the Explorer core class
four new prestige classes
new feats and spells
It should be obvious that the entire book is accessible to GMs, while only the second half should be made available to players who are trapped within a maze.