Mangrove Coast by Randy Wayne White

I enjoy this Doc Ford series but after 4 books I'm noticing that the plots are pretty simple with a lot of filler, but it's still an enjoyable listen, and the narrator Ron McLarty does a real fine job. PW: The seductive daughter of a dead war buddy calls marine biologist Doc Ford in need of help--her mother has vanished without a trace in South America. Doc's efforts to find her take him from the jungles of Colombia to the streets of Panama--and onto the trail of the most vile nemesis he has ever come up against...