With simple rhymes and colorful, highly detailed images, cartoonist Sage Stossel creates a "Where's Waldo?"-style hit, setting animals free from Franklin Park Zoo and challenging children to find them in settings from Faneuil Hall to Fenway Park.

In the city of Boston, / in fair Franklin Park, / sits a snug little zoo / that closes at dark.

One morning the keeper / discovered a note. / "We've gone for a walk," / the animals wrote.

"Oh, dear," said the keeper, / "what am I to do? / My critters have left me / alone at the zoo"...

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