The lucky hermit crab found a perfect, swirly new shell to replace her old home she had outgrown. But when she gets too big for this shell, will she be able to let go of her favorite shell to find a new, bigger one that will keep her safe and comfortable?This is Petrie's fourth illustrated children's book in her Seatales Sea Animal series. Her other books include: The Bumpy, Lumpy Horseshoe Crab, Did You Make the Hole in the Shell in the Sea?, and Something's Tugging on My Claw! Each book in this series is a rhyming adventure, with brightly colored illustrations that bring to life authentic tales of what really happens at the edge of the sea. Petrie's books are perfect for ages three through ten, but most adults are surprised at how much they learn from reading these stories, too!