Super Short Summary

I Know This Much Is True by Wally Lamb follows the lives of twins Dominick and Thomas Birdsey in Three Rivers, Connecticut. Thomas suffers from paranoid schizophrenia and, after a public self-harm incident, is institutionalized. Dominick, coping with his own grief and difficult relationships, attempts to help his brother by working with a compassionate psychologist and uncovering family history through his grandfather's autobiography.