The baseball card conspiracy. (Hardy Boys mystery stories, #117.)

When the Hardys' friend Biff falls victim to a counterfeit baseball-card scheme, Frank and Joe go undercover at a baseball memorabilia convention in New York City. Original. The Hardys go to bat against a major league team of counterfeiters There's trouble in the cards when Frank, Joe and their friend Biff visit a baseball memorabilia convention in New York City. Biff buys a hard-to-find card only to learn that it's a counterfeit and that more than a few bucks are at stake. The card may be a fake, but the danger to Biff and to the Hardys is as real as it gets. Frank and Joe discover that the baseball card scam is just the beginning - a very small slice of a very criminal pie. And when that much is on the line, the Hardys know they'd better be ready to play some serious hardball There's trouble in the cards when Frank, Joe, and their friend Biff visit a baseball memorabilia convention in New York City. Biff buys a hard-to-find card only to learn that it's a counterfieit and that more than a few bucks are at stake Biff, a friend of Frank and Joe, buys a rare card only to find it's a fake. Frank and Joe discover that the baseball card scam is only a small piece of a larger criminal operation