When a dinosaur fossil hunter is blackmailed by kidnappers who need her to fake a validation in return of her beloved pooch, Ada and Mary are given three days to find the offenders and save the scientist's reputation.

After Joe's high tech Wombat running shoes blow out during a 100-meter dash, the boys' investigation at a local sporting goods store produces flying fists and swinging bats--all aimed at the Hardys.

This “winner” (School Library Journal) of a history-mystery-science series continues as the Wollstonecraft Detectives--Ada Byron Lovelace and Mary Shelley--take on a case from the celebrated dinosaur bone hunter, Mary Anning. The Wollstonecraft Girls embark on their most important case yet--the famed dinosaur fossil hunter Mary Anning is being blackmailed. Her precious dog has been snatched and the kidnappers are demanding that Miss Anning authenticate some fake dinosaur bones up for auction at the British Museum in order to get him back. Ada and Mary have just three days to track down the fossil fakers, find the dog, and save the integrity of science! The game is truly afoot in this quirky caper involving blood-sucking leeches, an asthmatic pug, smoke bombs, secret elevators, diabolical disguises, and wicked word-play. Praise for The Case of the Missing Moonstone: "An enjoyable plot, resourceful heroines and fun writing." --Wall Street Journal "Smart and witty. . . . The detectives in training use quick thinking, book smarts, and social know-how to find a stolen gemstone. Comical narration and dialogue will charm readers thoroughly." --Publishers Weekly Praise for The Case of the Girl in Grey: "Mystery fans ... will relish the girls' romp around the stately home; discovery of an encrypted clue (in the crypt, of course); and unraveling of the mystery."--Booklist “Equal parts laughs and adventure, this lively mystery will keep you guessing till the end!” –Discovery Girls

The Hardy Boys investigate a case of counterfeit gym shoes. Hardy Boys #114.

This history-mystery series continues with another fine display of brains and bravery from the Wollstonecraft Girls—Ada Bryon Lovelace and Mary Shelley. Inspired fun for middle grade readers and fans of The Mysterious Benedict Society and Lemony Snicket! The Wollstonecraft Detective Agency was supposed to be a secret constabulary, but after the success of their first case, all of London knows that Lady Ada and Mary are the girls to go to if you have a problem. Their new case is a puzzle indeed. It involves a horrible hospital, a missing will, a hasty engagement, and a suspiciously slippery servant. But Mary’s stumbled onto a mystery of her own. She spotted a ghostly girl in a grey gown dashing through the park. A girl who is the spitting image of their new client. The two cases must be linked . . . or else there’s a perfectly supernatural explanation.

History, mystery, and science collide in a new series for middle-grade readers, perfect for fans of The Mysterious Benedict Society and Lemony Snicket! Jordan Stratford imagines an alternate 1826, where Ada Lovelace (the world’s first computer programmer) and Mary Shelley (author of Frankenstein) meet as girls and form a secret detective agency! Lady Ada Byron, age eleven, is a genius. Isolated, awkward and a bit rude—but a genius. Mary Godwin, age fourteen, is a romantic. Adventurous, astute, and kind, Mary is to become Ada’s first true friend. And together, the girls conspire to form the Wollstonecraft Detective Agency—a secret constabulary for the apprehension of clever criminals. Their first case involves a stolen heirloom, a false confession, and an array of fishy suspects. But it’s no match for the deductive powers and bold hearts of Ada and Mary. Mystery fans will love this tween girl riff on Sherlock Holmes and John Watson. History buffs will be delighted to see all the real figures who play a role in this story and appreciate the extensive backmatter that helps separate truth from fiction. Parents and educators hoping to promote the STEM fields for girls will be thrilled to have a series where two girls use math, science, and creative analytical thinking to solve crimes. But most especially--emerging readers will love this series filled with humor, action, intrigue and wonderful artwork from Kelly Murphy.

Prior to the Civil War, the United States did not have a single, national currency. Counterfeiters flourished amid this anarchy, putting vast quantities of bogus bills into circulation. Their success, Mihm reveals, is more than an entertaining tale of criminal enterprise: it is the story of the rise of a country defined by freewheeling capitalism and little government control. Mihm shows how eventually the older monetary system was dismantled, along with the counterfeit economy it sustained.