Agatha Mystery. Book 1. The Pharaoh's Riddle

Endowed with a fantastic intuition and a phenomenal memory, Agatha Mystery dreams of becoming a writer of detective novels. But that is in the future; for now, she is simply an excellent detective! Together with her hapless cousin Larry, a student at detective school, she travels the world to solve the most perplexing mysteries. They are aided by a devoted butler, a grumpy Siberian cat, and a multitude of unique eccentric relatives. 

The Pharaoh's Riddle.
Egypt, Valley of the Kings. A group of archaeologists is preparing to announce to the world the discovery of the tomb of a mysterious pharaoh. This discovery could be the greatest sensation... but, unfortunately, the priceless tablet with instructions on how to locate the tomb has been stolen. And this riddle can only be solved by the future detectives Agatha and Larry Mystery!