612.3 SIMO / J : Guts : our digestive system / Seymour Simon.
612.3 SMI / J : What happens to your food? / Alastair Smith ; illustrated by Maria Wheatley ; designed by Maria Wheatley and Ruth Russell ; digital artwork by John Russell ; series editor, Judy Tatchell.
612.3 SOH / J : A journey through the digestive system with Max Axiom, super scientist / by Emily Sohn ; illustrated by Cynthia Martin and Barbara Schulz.
612.3 Tro / J : What happens when I burp? / by Jaden Troiano.