Charlie Lewis goes on a roller coaster ride of risk, math, and gaming in this middle grade novel that parallels the New York Times bestselling Bringing Down the House, which inspired the movie 21 with Kevin Spacey. Charlie Lewis is a nerd. All he's ever been good at is math and he's really good at math. So good that he's recruited by a group of kids determined to game the system at the biggest theme park in the world and win the grand prize. Soon Charlie is caught up in the excitement and thrill of using his math skills for awesomeness, but what's at stake may be more than he's willing to risk. How far will Charlie go for a chance at the ultimate reward?

Charlie is recruited to use his mathematical prowess to discover what happened to a box of stolen moon rocks in this follow up to Bringing Down the Mouse . Charlie Lewis is really good at math. So good, that he’s approached by a mysterious woman who needs his help. The woman is carrying an incredible an actual moon rock, one of the most valuable objects on Earth, and she’s investigating the theft of a box of moon rocks from NASA’s vault at the Johnson Space Center, and believes the stolen rocks are now in the possession of a former astronaut. Although she claims to work at NASA, Charlie suspects she is something else—but he decides the adventure is too good to pass up. Charlie and the whiz kids go undercover by entering the Smithsonian Air and Space Museum’s paper airplane contest, and head down to the nation’s capital. Working together, they master the principles of aerodynamics, wind science, and gravity to excel in the competition. Charlie must decide how far he’ll go to solve the mystery of the stolen moon rocks; is he willing to betray a new friendship? Or has he unwittingly been drawn into something even bigger than some missing chunks of the moon?

Charlie and the Whiz Kids discover a prehistoric mammoth tusk and stumble right into the nefarious clutches of an eccentric billionaire in this hilarious third novel of the Charlie Numbers series.Charlie Numbers and his gang of Whiz Kids—along with a few new allies—are on another this time, to uncover the truth behind the mysterious mammoth tusk they found buried in the Boston Public Gardens. Their hunch? Blake Headstrom, eccentric billionaire, philanthropist, and collector of some renown, has been smuggling mammoth tusks into the city. The only question Why? Selling woolly mammoth tusks isn’t illegal…but selling elephant ivory is. And Charlie’s certain Headstrom’s plans are more sinister than they seem. But Headstrom is a powerful man, with powerful connections. If the Whiz Kids want to expose him for the criminal they know he is, they’re going to have to catch him red-handed. Now if only Headstrom’s henchmen weren’t lurking at every turn…