Every eleven years, Earth's senior wizards hold the Invitational: an intensive three-week event where the planet's newest, sharpest young wizards show off their best and hottest spells. Wizardly partners Kit Rodriguez and Nita Callahan, and Nita's sister, former wizard-prodigy Dairine Callahan, are drafted in to mentor two brilliant and difficult cases: for Nita and Kit, there's Penn Shao-Feng, a would-be sun technician with a dangerous new take on...