I Know This Much | Is True

: The 1998 bestselling novel by Wally Lamb , which follows the lives of identical twin brothers Dominick and Thomas Birdsey.

The phrase is highly recognizable across several different mediums. To provide the most helpful information, could you clarify if you are looking for: I Know This Much Is True

: The 2020 HBO limited series starring Mark Ruffalo , which is based on Wally Lamb's novel. : The 1998 bestselling novel by Wally Lamb