Not a bad story - woman stumbles across a 60s eco-terrorist group and brings them to justice.
The reason I'm dropping a star is that it tends to ramble in places. The author also writes history books and this becomes obvious. The history adds background and is interesting ... but it just goes on for too long. I found myself skimming some of this book, just looking for where the story picked up again.
A fairly good tale, let down by wandering into history (IMHO)