It is the story of Marina Singh, a research scientist and doctor who works for a large pharmaceutical company in Minnesota. One of the company's projects is funding research in the Amazon jungle that deals with fertility - specifically extending a woman's fertility into her later years. (Why any woman would want to have a child in her 70s is beyond me, but in the book the pharmaceutical company thinks there is a huge market for it).
The doctor in charge of the research in Brazil, Dr. Swenson, is non-compliant when it comes to communicating her progress and details of the research, so another researcher and colleague of Marina's is sent to the Amazon to find out what is being done.
After he has been gone for a couple of months, word is sent that he contracted a fever and died. So, Marina is sent to find out what really happened to him and to bring back his personal effects.
When she finally gets to the jungle and to Dr. Swenson's camp, nothing and no one is what she expects and by the end, she has overcome some things from her past, and her world is forever changed by her experiences.
The book is a compelling read, with some unexpected plot twists. And of course no story that takes place in the Amazon jungle would be complete without encounters with cannibals, poison arrows, anacondas, and harpy eagles(!), all of which can be found in this book.
Overall, I really liked this book...that is until I got to the last chapter and the author threw in a couple of things that were totally unnecessary. 3 out of 5 stars on this one.