Young worriers will relate to -- and be comforted by -- this tale of a boy's anxiety as he heads to his first big party. What if Joe doesn't like the party he's going to? What if he doesn't like the food or the games or the people? As Joe and his mom walk down the darkening street, Joe's imagination starts to run wild. And as they search for the right place, he wonders "what if . . ." at each house, peeking in to see some surprising sights. From the award-winning former British Children's Laureate Anthony Browne comes a picture book whose slyly bewitching setup unfolds to a reassuring ending.