Synopsis

So far the Souptown Secret Society hasn't had any problems solving crimes- be it catching the bicycle thief, tracking an ancient treasure that belongs to a University student society, protecting an old building or identifying a mysterious flower snatcher.This time the kids are dealing with a laundry room that belongs to the peculiar Professor Black. There is something odd going on there. The society arranges an ambush and collects information from neighbours. While trying to solve the case the kids end up in tricky situations themselves.

The first book in Keränen’s The Souptown Secret Society series was The Stolen Orange Bicycle (2008). Professor Black is the fifth.