Recounts the true story of how four boys looking for buried treasure in the south of France in 1940 stumbled upon something much more valuable--a sealed cave whose walls were covered with prehistoric paintings and engravings.

When Hildy finds a stolen watch concealing a crude, hand-drawn map, she is accused of the theft and must try to clear her name.

Puzzles accompany the story of Mrs. Jeepers' class on an exploration of Ruby Cave.

Solve kid-sized dilemmas and mysteries with the Science Solves It! series. These fun books for kids ages 5–8 blend clever stories with real-life science. Why did the dog turn green? Can you control a hiccup? Is that a UFO? Find the answers to these questions and more as kid characters dive into physical, life, and earth sciences. Rick is headed out west to his aunt and uncle’s dude ranch. He gets to ride a horse and see the local wildlife. But best of all, Rick and his cousins find a cool cave nearby. Maybe the cave holds the key to a century-old stagecoach robbery! Books in this perfect STEM series will help kids think like scientists and get ahead in the classroom. Activities and experiments are included in every book! (Level One; Science topic: Caves)

“No time to explain—they will see you, now run!” Learning that an expedition is studying a group of endangered terns, Jan joins the group with her father to help him with his research and see if she can do anything to protect them. While at the nesting site on the cliffs, she finds a small silk bag in a cave, and so starts an adventure with many unexpected surprises. When she learns poachers have stolen many tern eggs, she is determined to rescue them, and with a little help, to transport them, along with their parents, to Ituria’s Island where they will be safe. But what chance does a young girl have against a band of poachers? This book is great for early readers who love learning about animals and birds as well as how to help their environment. Themes include asking for help, building self-courage, and encouraging self-discovery.

A wildly exciting adventure series from bestselling author Anh Do. Gwen has been searching for her family for a long time. Just when she feels she is close, the soldiers following her start to close in. Then one of her dogs is injured, and the gang must slow down... Who can Gwen trust? And how will she keep her pack safe from dangerous enemies? Does this spell disaster for the one and only Wolf Girl?