A series of mysteries. An explosion of truths. The Explosionist: Someone sets off a bomb outside fifteen-year-old Sophie's boarding school, but no one can figure out who. The Medium: Soothsayers and séance leaders are regular guests at her great-aunt's house in Scotland, but only one delivers a terrifying prophecy, directed at Sophie herself. The Murder: When the medium is found dead, Sophie and her friend Mikael know they must get to the bottom of these three mysteries in order to save themselves—even as the fate of all Europe hangs in the balance. Set in a time of subversive politics, homegrown terrorism, and rapidly changing alliances, The Explosionist is an extraordinarily accomplished debut novel for teens that delivers a glimpse of the world as it might have been—had one moment in history been altered.