Snape's eyes flashed. He plunged a hand into the inside of his black robes. For one wild moment. Harry thought Snape was about to pull out his wand and curse him - then he saw that Snape had drawn out a small crystal bottle of a completely clear potion. Harry stared at it.

"Do you know what this is. Potter?" Snape said, his eyes glittering dangerously again.

"No," said Harry, with complete honesty this time.

"It is Veritaserum - a Truth Potion so powerful that three drops would have you spilling your innermost secrets for this entire class to hear," said Snape viciously.

Chapter 27