[Titans...? That can refer to a lot of things, but he'll probably get more answers if he gives some of his own, so-]

Not a practical one, really. It's simply something to aim for until this place decides to send you home.

As for what the book doesn't tell you... a fair bit, really, though I haven't come across any mention of "titans" in my studies. That may be something present in your world that isn't present here.