When I read return to the labyrinth, you see jereth and he's angry cuz Sarah left him, and he says, 'dangers untold? Yeah right there was barely any danger. And hardships unnumbered? There were twelve at most.' I laughed so hard when I read that... O.o
I didn't know for forever either. It's a manga though. You can find the first two on the Internet, but the third and fourth I'm going to have to find at my library, because most carry all of the books.