There are 3 books in the Passport To Danger series.
The Passport To Danger series does not have a new book coming out soon. The latest book, Checkmate in the Carpathians (Book 3), was published in June 2000.
The first book in the Passport To Danger series, The Secret of the Mezuzah, was published in May 1999.
The Passport To Danger series primarily falls into the Amateur Sleuth and Christian genres. This young adult series was written for ages 12-17, but can be enjoyed by adults too.