This Was Our Pact by Ryan Andrews. Graphic Novel
“The night of the annual Autumn Equinox Festival unfolds as the villagers cast hundreds of lanterns down the river in honor of a local folk legend. For Ben, this year will be different from the rest. He and his friends make a pact to follow the lanterns until the unknown end of their voyage. One by one Ben’s friends give up and return home, all except for Nathaniel, whose love for the cosmos and nerdy ways ostracize him from the group. In spite of his misgivings, Ben decides to uphold the pact with Nathaniel…Brilliantly enchanting. (Graphic fabulism. 10-14)” Source: Kirkus Reviews