Mask of Duplicity — Arleen Gabrio

Carol's household gets sick. Jason, Jimmy, Simone, and Cindy are trying to escape the flu by staying out in their Uncle Dave's sailboat all day. It worked too well when they don't return by night fall. Search parties are out looking for the kids.
Fortunately, the flu is a twenty-four-hour bug. Even so, not everybody feels like jumping up and down, especially the ones that are injured with broken bones.
Some very exclusive mansions up the coast are being robbed of all their valuable antiques and treasures.
Mike and Peter are baffled by how the stuff is being stolen. No one sees a truck coming or going from the burglary site and for the quantity being stolen, it would take a truck to transport it all.
It's another fun filled mystery at Carol's house.
This is not a cliffhanger story! It is a complete cozy mystery story for all ages. Full of the escapades of Mike and Peter, FBI agents along with their friends who like to have fun.