"I forgot," Oxy said when they were in the library. "I already took the map and it's in the principal's office."
"Isn't there a copy here?" Hydro asked as he walked over to the shelf. "Is the library at your school like this?" only his voice was heard after his body disappeared into the aisle of one of the shelves.
"Yes, the library is the same in every detail," Oxy answered. "And I'm not sure there's still a copy of it. Because we only have one map in our library, I mean, the library in our world..."
"Then, what we must do?" Selena asked. "My father kicked us out of there. And I don't want to go back and see his annoying face."
"But the only way is to get back there," Oxy said. "We must take the map."
Hydro was back with one book in his hand. It was a math book and it looked so thick. Oxy never saw that book or she didn't ever try to find it. Anyway, she wouldn't read that book if she ever saw it.