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 mission: 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 is: 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...
About the Author: Ben Mezrich graduated magna cum laude from Harvard. He has sold over ten million copies of his twenty-four published books, including the New York Times Bestsellers The Accidental Billionaires, which was adapted into the Academy Award-winning film The Social Network, and Bringing Down the House, which was the basis for the hit movie 21. His current bestseller The Antisocial Network is being adapted into the feature film Dumb Money. Ben has written and produced for the hit TV show Billions on Showtime, and he travels the world speaking to audiences of all ages about writing books and the adventures he has experienced from each of his stories. He lives in Boston with his wife, two kids, and two pugs.

When Tonya Mezrich was little, she preferred art to reading. But then she learned that reading could be just as cool, and her love for books led her down a winding path to becoming a writer. She attended Tufts University, where she studied French literature, art history, and eventually dentistry. She later developed clothing and jewelry lines, launched and cohosted the TV show StyleBoston, and created and hosted Boston's Red Carpet on NESN as a follow-up to her role as resident fashion expert at NBC Boston. Tonya is now the lifestyle editor of Boston magazine. She and her husband, Ben, also penned Charlie Numbers and the Man in the Moon, which was chosen as the required summer reading for all sixth graders in Boston Public Schools. The Charlie Numbers Adventures book series is slated to be developed into a movie series with Ellen Pompeo of Grey's Anatomy. Tonya and Ben live in Boston with their two kids and pugs, Bagel and Cream Cheese.