My gf is colombian and her dad actually was in the military in Colombia and he showed me this book. He was actually in the hunt for some of these guys. It is about a insider who was hired to kill Pablo and actually turned informent and he help bring down the Cali Cartel. One of the best books I have read in a while. The book in english is 'At the Devils table' by William Rempel. I read the spanish version which is En el Boca del Lobo.

I couldnt put this thing down and read it in 2 days. If you like this stuff make sure you read it.