Cursed had not been a particular concern of Sasuke's, though now that she mentioned it he was forced to look at the book in his hands with a considerable amount more suspicion, especially given the distrust in her tone. He'd never heard of even spy jutsu like this, but then again, he'd hardly gone on the number of typical espionage missions a regular shinobi might have by his age.

"You communicate with others through this book?" He frowned at the page, recognizing the name of the very woman who had sent him here. "Why would people share information freely like this?"