What do you get when you put together the coolest kid in class, an unpredictable live-in grandmother, and a caring but anxious grandson? Disaster? No. You get to know Ruben Plotnick. David is worried about how zany Ruben Plotnick will react when he meets Grandma Rosie, who often says and does unexpected things. Will Ruben make fun of her to their classmates? Will he imitate her whispery voice? What will he do if Grandma Rosie suddenly wants to dance? This heartwarming story of senility and school-age embarrassment reveals the importance of looking beneath the surface to really get to know someone.