Humble Pie, Double Trouble Series by Wanda Brunstetter and published by Barbour Publishing.
Twins Mattie and Mark Miller get a taste of Humble Pie in their Holmes County, Ohio, community. Whether they're bragging about their ability to play sports, ace a test, bake a cake, or win a pie-eating contest, the exuberate almost 10-year-olds just can't seem to tame their pride.