In the newest installment of Audrey and Bruce Wood’s alphabet series, Charley goes to visit his grandparents for the summer, and his lowercase letters go on vacation to Alphabet City, the place where they were born. There, the lowercase letters are excited to see a new fire truck—until they are told that they are too small to use it. Wandering around, they find an abandoned fire truck, clean off the m-u-d themselves and proceed to save a c-a-t from a tree. Suddenly, the factory where all letters are made catches fire, and the capital letters’ truck’s tire blows out. It’s up to the lowercase letters to save the day and work together with the capital letters to squelch the flames—and return home in time to help Charley write a thank-you note to his grandparents. While the plot is a trifle thin, the hyper-realistic artwork, the bright colors, the spelling puzzles and the inventive use of letters within the text will no doubt appeal to children just becoming familiar with their ABCs. (Picture book. 3-5)