Spy in the Sky by Hope Callaghan

Liz’s new mini-mansion has finally been renovated with no detail overlooked. She can’t wait to throw a huge party to show off her elegant “farm chic” chateau. Unfortunately, there’s a problem…noise pollution in the sky.
A small, private plane has started flying over and Floyd is convinced the pilot is spying on them because of the natural gas recently found on the property, guaranteed to make the couple even wealthier estate owners.
Tensions escalate when the annoying pilot begins tossing tomatoes at their property at all hours of the day and night. When the plane is shot down, authorities focus on Floyd, who swears he had nothing to do with it.

Gloria and the Garden Girls jump in to help clear his name but soon uncover disturbing clues that lead them to believe Liz’s husband could be behind it after all.