David A Adler

In his latest case, young Jeffrey Bones tries to discover the whereabouts of his grandfather's missing birthday present.

Biography of the black woman who escaped from slavery to become famous as a conductor on the Underground Railroad.

On a field trip to the zoo, Cam Jansen uses her photographic memory to help solve what happened to Danny's lunch.

A brief, illustrated, biography of the Baptist minister and civil rights leader whose philosophy and practice of nonviolent civil disobedience helped American blacks win many battles for equal rights.

While Cam's Aunt Molly is competing in a comedy contest, the expensive plate the winner will receive disappears and Cam and Eric set out to find it before the contest is over.

Detective Jeffrey Bones finds he does not need fancy equipment to solve the school-lunch mystery of Not Me Amy's missing cupcake.

Young Detective Jeffrey Bones investigates the disappearance of the plastic dinosaur his grandfather just bought for him in a museum gift shop.

When Sally's entry in the Best Pie Contest goes missing, young Detective Jeffrey Bones looks for clues.

While at the airport waiting for her father to pick up his best friend from childhood, Cam Jansen uses her photographic memory to help a distressed father find his missing daughter.

From bartering, early forms of currency, credit cards, and digital payment, here is a clear and thorough introduction to money.