3 in 1 Mystery Series
Top Secret
The Second Secret
The Secret Revealed

As Shraga Morgenstern and Pinny Katz prepare to travel up to the Lake View Hotel along with their physicist fathers and a very secret weapon, they never dream of the perils that lie in wait for them. Their quiet retreat soon turns into a nightmare when they discover that the new and deadly weapon their fathers have been working on has disappeared.

Just when Shraga, Pinny, and their young detective friends think they have solved the mystery of the stolen little black box, another layer unfolds. Can the boys clear the cloud of suspicion that hangs over they fatehrs' heads - and survive the sinister "accidents" that threaten  their own lives?

Before their done, they're going to find themselves in great danger than they'd ever dreamed possible. Shraga, Pinny, and their friends with need to muster all their wits -  and their courage - to unmask the sinister figure behind the crime.

Authors: Libby Lazewnik, Perel Schreiber