From Grant Ginder, the bestselling author of The People We Hate at the Wedding, comes a generation-defining novel that is part love story, part tragic comedy. Five parties over the course of twenty years bring six college friends together, exploring the ways we run from and cling to our friends in love, life, and death.

For Marco and Mia, Sasha and Theo, Richie and Adam, the one constant in life after college together has been change. New jobs. New cities. New spouses. New children. Through it all, one thing they thought would always stay the same is their friendship. But time has a way of breaking even the strongest bonds, and testing what we thought we knew. As Ginder wondrously weaves us through the lives of these characters, from the overcrowded apartment parties of their twenties to the destination wedding crippled by high expectations and dreaded exes of their thirties, fortieth birthday parties that ring in a new decade and new problems, and backyard barbecues with too many toddlers and not enough wine, So Old, So Young is a resonant, funny, and deeply moving novel about the growing pains of adulthood, and a celebration of how love can shift, stumble, and grow into something bigger than we ever could have imagined.