Adler, David A

Presents simple directions for using a calculator to play games, and some intriguing problems to solve which have surprising answers.

Two sets of twins suspect their neighbors of wrong-doing when they observe the strange behavior of the couple's nephew.

Explains through simple experiments the principle of dimensions and how they are measured.

Cam uses her photographic memory to find a shopping list that her dad lost at the library.

Explains how a bank works through its functions of saving, lending, the use of checks, and other aspects of banking.

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

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

Jennie's dog, who is good at solving mysteries, helps her friend Susan find her lost house key.

Discusses the history of money from the mediums of exchange used by primitive societies to the currency, and variations thereof, used in today's highly complex world.

Recounts the adventures of Dolley and James Madison during the years James Madison served as the fourth President of the United States.