4 books in series

Carmen Sandiego: You Are the Detective

Carmen Sandiego: You Are the Detective is a 4-book series with 4 primary works first released in 1991 with contributions by John Peel and John Abbott Nez.

Where in the World Is Carmen Sandiego?
Where in Time Is Carmen Sandiego II
Where in the USA Is Carmen Sandiego?
Where in Space Is Carmen Sandiego?