Charlie Small is twelve years old when he falls through a gap in space and time and finds himself on an extraordinary series of adventures! This is his third lost diary.

The fifth extraordinary adventure of twelve-year-old Charlie Small; a fact and fun-filled diary telling of his amazing adventure to the Underworld. Armed solely with his rucksack and quick wits, Charlie needs to get back to the earth's surface or risk running into the spitting spidion!

When Charlie Small is twelve years old he falls through a gap in space and time and has been trying to get home ever since - his second lost diary, full of drawings and top tips for survival, reveals how he ends up as a cabin boy for a gang of cut-throat pirates and must face a ferocious enemy!

Charlie Small is twelve years old when he falls through a gap in space and time and finds himself catapulted into an extraordinary series of adventures!

The sixth extraordinary adventure of twelve-year-old Charlie Small; a fact and fun-filled diary telling of his amazing adventure in Frostbite Pass. Charlie is looking for Will Jakeman's factory where he makes his incredible Mechanimals - but he has to get past the slobbery Swamp Monster first!

The fourth extraordinary adventure of twelve-year-old, Charlie Small; a fact and fun-filled diary telling of his amazing adventure to Destiny Mountain, where he finds himself in the wicked Wild West and must deal with the most wanted outlaw of all time!

In this sequel to the New York Times bestselling Charlie Thorne and the Last Equation—which #1 New York Times bestselling author Chris Grabenstein called “a real page-burner”—Charlie searches for Charles Darwin’s hidden treasure in South America. Charlie Thorne is a genius. Charlie Thorne is a fugitive. Charlie Thorne isn’t even thirteen. After saving the world, Charlie is ready to take it easy in the Galapagos Islands. That is, until she’s approached by the mysterious Esmeralda Castle, who has a code she knows only Charlie can decipher. In 1835, Charles Darwin diverted his ship’s journey so he could spend ten months in South America on a secret solo expedition. When he returned, he carried a treasure that inspired both awe and terror in his crew. Afterward, it vanished, never to be seen again… But Darwin left a trail of clues behind for those brave and clever enough to search for it. Enter Charlie Thorne. In a daring adventure that takes her across South America, Charlie must crack Darwin’s 200-year-old clues to track down his mysterious discovery—and stay ahead of the formidable lineup of enemies who are hot on her tail. When an ancient hidden treasure is at stake, people will do anything to find it first. Charlie may be a genius, but is she smart enough to know who she can trust?