A shelf for a child whose family is growing new branches, a parent remarrying, a stepparent moving in, stepsiblings down the hall, two houses instead of one. Pick the one that fits your child's age and where they are right now. There's a bright, no-tears picture book for the littlest child, a tender one for the stepparent who's just been told 'you're not my real mom,' an honest story about jealousy when new stepsiblings arrive, and a full novel for the older child living between two homes. Start with The Family Book if you're not sure where to begin, it's the gentlest, happiest way in.
Choose by your child's age and what they're living. The two celebration books, The Family Book and Families, Families, Families!, are for the youngest child and for opening the whole subject cheerfully: every kind of family, drawn bright and funny, treated as ordinary. The middle picture books get more specific, You're Not My REAL Mother! for the loyalty bind between a child and a stepparent, Do You Sing Twinkle? for the machinery of divorce, remarriage and new stepsiblings, and Boundless Grace for the child with a parent who's moved away and made a new family. Blended is the one novel, for an older child who can hold a fuller story about two homes, being biracial, and a scary brush with racism. Wherever a book touches your child's real life, read it close, and let the talk matter more than finishing.