"Don't let him stay home," was what author Peter Dean's mother advised his future wife in the months prior to their wedding. Unusual advice from a future mother-in-law but it was her constant refrain. But stay home is exactly what Peter did with the birth of their first child. Peter joined the small but growing ranks of At-Home Dads. A couple of years later, the Dean roster expanded and now he had a child for each hand. "Whose Mommy Is That?" is Peter's humorous memoir from the early years of what he likes to call "The Greatest Job on the Planet." For Peter's young children, each day was an adventure and even the most mundane activity could quickly become an eye-popping experience. "Whose Mommy Is That?" captures the fun, exuberance, and wonder of his children's younger years.