Charlie Thorne Series by Stuart Gibbs

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... moreIn 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? less

In this third book in the Charlie Thorne series from bestselling author Stuart Gibbs, Charlie tracks down Cleopatra’s greatest treasure in Egypt.Charlie Thorne is a genius. Charlie Thorne is a renegade. Charlie Thorne isn’t going down without a fight.After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet... moreIn this third book in the Charlie Thorne series from bestselling author Stuart Gibbs, Charlie tracks down Cleopatra’s greatest treasure in Egypt.Charlie Thorne is a genius. Charlie Thorne is a renegade. Charlie Thorne isn’t going down without a fight.After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet.In 30 BCE, Cleopatra and her husband, Marc Antony, lost their war against Octavian for control of the Egyptian Empire. However, Cleopatra knew Octavian was really after the mysterious item that was the source of all her wealth and influence, so she hid it before committing suicide. She left a series of devious clues behind for her children to find it, but they were lost to history…until now.In a breathless adventure that takes her across the globe, Charlie must fight for her life against ruthless enemies, match wits with Cleopatra, and solve the two-thousand-year-old mystery to prevent the most powerful treasure of the ancient world from falling into the wrong hands. less