Cut Scene #3, Fred and George and Delphi in the Library (Chapter 12)
"Yes," Delphi said impatiently. "I want to read it. Can I have it back?"
"What d'you want with it?" asked Number One.
"To read it, obviously. What do you do with books?"
Number One exchanged a smirking glance with Number Two. "Reading—" he said.
"—and, occasionally, pranking," said his brother. "But that's not what we meant."
"What kind of spell are you trying to create?" asked Number One. He grinned impishly, like he couldn't wait to hear what she had to say—and, more importantly, couldn't wait to put the information to some mischievous use.
"Doesn't matter," said Delphi. She grabbed at the book, but Fred-or-George snatched it out of the way too quickly. She glared. "Would you please give me that?"
"You know this stuff's dangerous, right?" asked Number Two.
"I heard about a guy last year," said Number One. "He was working on an alternative to Floo Powder."
"I remember," agreed Number Two. "Fused himself with his own brick wall, the poor blighter. Ministry couldn't do a thing for him."
Number One narrowed his eyes skeptically at Delphi, but she could tell there was more playful mockery to it than actual judgment. Not that it did anything to ease her nerves. "Do you look forward to accidentally fusing yourself with a wall?"
"No," said Delphi. "That's why I want the book. I keep accidentally lighting things on fire and blasting them across the room, and while that's very amusing, it's not quite what I'm going for."
"Well, it's efficient mayhem, if nothing else," said Number One.
"But we'd hate if our little brother's second most interesting friend became part of the architecture."
Delphi glared, biting her tongue on the words second most interesting. "So you're not going to give it to me, then?"
"Nope!" said Number One brightly. "We're going to do you one better."