When Bill visits Grandma, she tells him about ``my other Bill...Your daddy's daddy,'' showing Bill a photo album that goes back to his grandfather's infancy. In zippy, expertly tuned dialogue, the two cover three generations of family history, Waddell deftly conveying the child's cheery self-confidence with just a glimmer of the deeper meaning the story has for Grandma. Johnson's realistic illustrations nicely extend the pathos and joy of Grandma's narrative and the affection she shares with young Bill. (Picture book. 4-8)