Mysteries beyond number! Among them, a locked castle, an iron dragon, a house of horrors, and the train of no return!

[Which is about uh...four things for those playing along at home. Truly uncountable.

There's a little more, but he's not really sure if he should tell Komaeda about the book covering the events of the prior killing game. He'll defer to one of the people from further ahead on that one.]