In A Hero's Prayer by Sheri Rose Shepherd, Isaac wants to be a superhero so he can help others. After giving his snack to a girl who couldn't afford to buy her favorite treat, Isaac learns that he already is a hero, because true heroes have hearts like God's. Written with boys ages 4 to 8 in mind, and features 'A Letter from My King' (God's message to the child) and a 'Treasure of Truth' (an applicable Bible verse).
