What was the point of the book of riddles?
It didn’t have any that stumped Blaine, nor did it contain even a hint of anything that could help them. I assume the only reason Jake was drawn to it then was to hint to the tet that generally that riddles would be important, and that they would need that hint to ride in the first place instead of being killed? Is that all there is to it, or did I miss something else that made it important?