Both timelines are well wrtten, but I enjoyed the historical thread more. This was the less predictable of the two and also had more interesting characters. That's not to say the modern thread was bad, it just didn't stand out as well.
As I say it's a good story. It starts off slowly but builds pace well and as you reach the end it's roaring along. The mystery of the disappearences is interesting and has a quite a satisfying explanation. It also has some creepy moments (which is always good). The author also writes action well and the scene setting was excellent, especially the mountain scenes.
I was quite pleased by how it led me through the story, there was some nice false trails to follow and it kept my interest going. Overall I enjoyed reading this, a recommended read.
Abandon is available from Amazon