But that doesn’t mean i know this much is true. I know this much is true was a book of the month club main selection and the june 1999 featured selection of the bertelsman book. Pin On Not Mundanes Allowed I know this much is true: I know this much is true book vs show . Everyone, from supporting characters on down to actors who show up in just one scene, is so. Mark ruffalo plays twin brothers in the adaptation of wally lamb's novel, i know this much is true. “i know this much is true” is based on the wally lamb book of the same name. Mark ruffalo stars in two roles, identical twin brothers dominick and thomas birdsey. Wally lamb's first two novels, she's come undone (simon & schuster/pocket, 1992) and i know this much is true (harpercollins/reganbooks, 1998), were # 1 new york times bestsellers, new york times notable books of the year, and featured titles of oprah's book club. Here’s why… i know this much is true opens on dominick birdsey narratin...