After going traveling through the book some more, I finally found the actual trap. There are a series of six rooms that interconnect with each other but do not reconnect back to the rest of the maze. There are many doors that lead to these rooms, but no exits (not counting the one-way trip to 24).
In the image above, I didn’t include any of the multitude of links from other rooms that make a one-way trip into this area.
As you can see, this area consists of the triangle of rooms 43, 22, and 38. The only exit from this triangle is from room 38 to room 40, which leads to a dead end in six, or leads you to 11. From 11 you can either return to 40, or get sent to the abyss in 24.