Eagle's Guard by Lindsey Stirling

"Well, enjoy your afternoon in the real world," said Aiden, giving her a big grin. "I'm going for an adventure."

Seventeen year old Aiden has done what few others ever achieve: he has taught himself to wield the eighteen magical runes. He dreams of adventure, yet he feels trapped in his life as a cloakmaker's apprentice. Then one day, amidst the flames of a burning building, Aiden has a chance encounter with an Eagle Rider—one of the elite magical guardians of the kingdom. When the Eagle Riders go missing, Aiden finds himself caught up in a conspiracy surrounding a long dead wizard.

Untrained and torn apart from his family, Aiden must embark on a dangerous journey in the hope of rescuing the few people powerful enough to save them all.