An adventure on the wide open ocean, and Ruby is all at sea. Can she crack the case while evading the clutches of the evil Count von Viscount? Well, you wouldn't want to bet against her.

"World War II has just ended, and Britain has established the Control Commission for Germany, which oversees their zone of occupation. The Control Commission hires British civilians to work in Germany, rebuild the shattered nation and prosecute war crimes. Somewhat aimless, bored with her job as a provincial schoolteacher, and unwilling to live with her overbearing mother any longer, twentysomething Edith Graham applies for a job with the Commission--but...

Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues -- thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. They think they've done everything right, but a tiny mistake leads to catastrophe. The serum is missing and Dan and Amy have to get it back and stop who stole it ... before it's game over.

Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair. Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded.

Wizard, Tubby, Skinny, and Snitch are private eyes. They have a very special clubhouse and they are very good detectives. Now, for the first time, three of Crosby Bonsall's favorite whodunits are together in one volume.