Dana Carlson, younger sister to Julie, leaves home and her sister for sixteen years. When Julie's daughter calls Dana because Julie is seriously ill, Dana makes the trip home, only to discover she arrived too late. Harboring her own secrets and grieving her sister, Dana vows to save others from the disease that took Julie and could be killing others.
With just enough suspense to help drive the plot forward without taking away from the emotional drama of the family and buried secrets threatening to come out along the way, Invisible is an enjoyable read. The plot is interesting, the characters real, and the emotions complex and the environmental discussion poignant, timely and just a little frightening.