The wrong chemistry (Nancy Drew)

Nancy, an 18 years old private detective, is called by the dean of the university in which her boyfriend is studying, to solve a mystery. The dean informs her that the Governement has sent a scientist to the college due to a top secret project, and the CLT, a rare chemical used by the project has been stolen 2 times ! Will Nancy solve the mystery and have a great time with her boyfriend ?...

A excellent police story written by Carolyn Keene and recommended by me !