Icefox

Unusual ingredients found in their products are threatening the good reputation of Gardener's Spice & Herb Company, so R&P Labs agree to investigate. But what seems like a simple job takes a deadly twist when one member of the Gardener family has a fatal accident on an icy road and another is freeze-dried along with the herbs.
In ‘Icefox', the eighth R&P Labs mystery, the scientific quintet of Rob, Phil, Ellis, Virginia and Mitch referee a pair of battling brothers, babysit a lively septuagenarian and find themselves on very thin ice as they race against time to discover who is killing off their clients one by one.