The Melancholy of Haruhi Suzumiya, Vol. 14

Guided only by a series of notes that direct him to do the most inexplicable things - 'Buy a small turtle and throw it into the lake' - Kyon and the Mikuru from eight days in the future complete the assigned tasks, hoping that things will become clear as the SOS Brigade's adventures for that week continue. But Kyon and Mikuru's scavenger hunt soon turns to a manhunt when Mikuru is kidnapped by a group of rogue espers, time travelers, and aliens!