Rules and Things Number 63: Never, Ever Say Something Bad About Someone You Don't Know—Especially When You're Around a Bunch of Strangers. You Never Can Tell Who Might Be Kin to That Person or Who Might Be a Lip-Flapping, Big-Mouth Spy.
Bud, Not Buddy (ed. Delacorte Books for Young Readers, 2001) - ISBN: 9780385729956