With an author's note about what big siblings need—extra guidance, reassurance, love—and sweet, engaging artwork, it's no wonder that nearly 4 million families have chosen I’m a Big Sister and its companion book, I’m a Big Brother, to prepare their young ones for their first big transition.

"Someone new is at our house," begins this loving, reassuring celebration of sisterhood from trusted author Joanna Cole.

Told through the eyes of a new older sister, this simple story lays out all the good things about being an older sibling, and just how exciting welcoming a new member to the family can be.

“I’m a Big Sister and I’m a Big Brother are bestsellers and it’s clear why. They empower first-time older siblings by filling them in on their new role: Mommy and Daddy’s helper with the new baby.” (“The Best Books for Soon-to-Be Big Brothers and Sisters”) — Brightly

Joanna Cole is the author of the popular Magic School Bus series, I'm a Big Brother, I'm a Big Sister, and many other award-winning books. In Asking About Sex & Growing Up, she provides a reassuring blend of practical guidance and scientific fact for the audience that needs it most.