What recurring nightmare does Rook have throughout his life, and why is this significant?

How does Rook feel when he is chosen to travel to Lake Landing as a librarian knight elect?

Who is Xanth, and why does he travel to Lake Landing?

Why is Rook so infatuated with banderbears?

What do Stob, Magda and Rook learn at Lake Landing?

Who is Wumeru, and how does she help Rook?

Describe the battle at the Tower of Night. Why does this battle take place, and what occurs during this battle?