Colorful locals, a smart girl from school, and an enigmatic character known as the Prophet. Seventeen-year-old Ty is stuck riding Portland's MAX Blue Line every day of the summer before his senior year, but what could be a boring commute turns into a discovery of human nature, an exploration of Ty's own inner thoughts, and opportunities to make new friends. Equipped with official summer assignments—to read Jane Eyre and write about what he learned over the summer—Ty also picks up a few unofficial assignments, including making astute observations about his fellow MAX riders and the colorful world around him, and recording what he sees in a series of letters addressed to his teacher Ms. Warne. Now, if he could only capture the attention of his high school classmate Janie who also rides the Blue Line.

From one end of the Blue Line to the other, from old wounds to new love, and all the stops in between, Ty gains a deeper understanding of human behavior, community, and even the inner workings of his own heart. The Blue Line Letters is a coming-of-age story, a love letter to mass transit (and Portland), and a comical, heartfelt ride that readers won't want to disembark.