Toxic designs
(Book)

Nothing hits as close to home as having a loved one get sick which means double trouble for Kate Stevens when her daughter, Vanessa, and her best friend, Vivi Lawrence, both become deathly ill within hours of each other. Vanessa is home for two weeks over summer break and a shared meal between the three of them seems to be the source of the food poisoning. But why doesn't Kate herself become ill? Is it just luck or is something more sinister about? Kate becomes all the more suspicious when Vivi has several recurrences of illness and doctors cannot find the cause. Kate is sure that someone is out to harm--or worse, eliminate--her friend but no one will listen to her protestations, not even Vivi.