Can you whistle, Johanna?

"Why doesn't Berra have a grandfather? And how can he get one? Ulf suggests that there are plenty of old men at the retirement home. Berra and Ulf go there together to find one--ideally one who eats pig's trotters, invites you to tea, and can teach you to whistle. A funny, sensitive, illustrated chapter book about a friendship across generations. Stark's writing covers every emotion, sometimes in the same sentence"--From the publisher's web site.