Care Homes Are Murder (Geezer-Lit Paul Jacobson series, book 5)

Octogenarian Paul Jacobson returns to Hawaii for a vacation with his family and becomes involved in a series of crimes, while struggling with the problems of his short-term memory loss. He faces a number of strange coincidences involving acts of vandalism, drug dealers and two murders. Paul puts all the pieces together, escapes a watery grave, and with the help of his friends, solves the murders.