Preschooler Katie narrates an A to Z journey through elements of her life. “A is for airplane” as it flies high overhead while Katie and her baby brother, Olly, play in the garden. “E is for everyone,” she says, introducing her entire family. “J is for jam and jam jar,” which is perfect for holding water when Katie paints. “O is for Olly of course!” even though he’s “annoying sometimes.” It’s the everyday- ness of these alphabetical details that gives them their charm, as does Hughes’s inimitable, comforting illustrations showing Katie and Olly, who are white, and, occasionally, their diverse neighborhood. (Ages 3–6)