Bored to Death — C.D. Moulton

A woman walks along the beach at Cusapín and meets the Faraday family. They becomes friends. she is running away from her business in Texas, but is becoming bored. They stay in contact. There has been some time with no communication, Then her body is found - only it is not her! Her son and daughter are there all of a sudden? A Colombian gangster is involved? What is going on?