"The wackiest road trip in history continues as the McDonald twins travel the Southwest dodging nefarious villains and visiting weird but true American landmarks"--

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.

Fifth-grader Nora Rowley has always hidden the fact that she is a genius from everyone because all she wants is to be normal, but when she comes up with a plan to prove that grades are not important, things begin to get out of control.

Nine-year-old Nicholas Benedict, an orphan afflicted with an unfortunate nose and with narcolepsy, is sent to a new orphanage where he encounters vicious bullies, selfish adults, strange circumstances, and a mystery that could change his life forever.

Thirteen-year-old Nikola Kross's world is turned upside down when her father is abducted by aliens and she is suddenly transported to a special boarding school for geniuses, but things get even stranger when she realizes she has certain abilities that put her entire school in grave danger.

"Twelve-year-old Jake McQuade--the smartest kid in the universe--goes to a camp for geniuses, where he goes up against the Virtuoso quantum computer, the smartest machine in the universe"--

The CIA forces twelve-year-old Charlotte "Charlie" Thorne, a rebellious genius, to use her code-breaking skills on an epic global chase to locate Einstein's last equation before dangerous agents discover it and unlock the solution to harnessing energy.

"Opal Koboi, the power-crazed pixie, is plotting to exterminate humankind and become fairy queen. If she succeeds, the spirits of long-dead fairy warriors will rise from the earth, inhabit the nearest available bodies, and wreak mass destruction. But what happens if those nearest bodies include animals, or two curious little boys named Myles and Beckett Fowl? Can Artemis and Holly stop Opal and prevent the end of the world?"--

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...