“Then say good-bye, Yosik. Say good-bye! So many people in this world do not get to say good-bye. Their adventures go unresolved. But you have a chance to make everything come together. To write your own ending. Isn’t that beautiful?” –Emil Ostrovski, The Paradox of Vertical Flight W hether you’re writing them or just trying to survive them, endings are hard. In his freshman effort for older teens, author Emil Ostrovski explores the range of emotions—and responses—the end of all manner of things provokes in all of us through the wildly impulsive road trip of a particularly philosophical high school senior named Jack. On the last birthday of his high school career, Jack receives the gift that really does keep right on giving: a…