Blue Lily, Lily Blue (The Raven Cycle, #3)

by Maggie Stiefvater

He wondered if he was going to go through each year of his life thinking about how stupid he’d been the year before.

Maybe it was good that the world forgot every lesson, every good and bad memory, every triumph and failure, all of it dying with each generation. Perhaps this cultural amnesia spared them all. Perhaps if they remembered everything, hope would die instead.