Number 6 is a bit of a heavy one. It is a true crime book by Dr Helen Morrison, who has interviewed some of the most famous serial murderers.
Her theories are really interesting and I really enjoyed the look inside some of these dangerous minds.
Dr Morrison interviews Gacy, Bundy, Gein and Rose West to name a few, and I always get hooked whenever I decide to re-read it.
Image from Amazon.co.uk
I have currently lent this one to Lauren of The Beauty Habit, who has put it in the freezer. Too scary! 
I love this feature, I am a big reader myself (travelling for a couple of hours on the tube each day will do that to a girl) and recently finished the Hunger Games trilogy (feel lost now)….I am now going to give some of the books you have read a go, though I may steer clear of this one sounds interesting but i’m really a fiction kinda lass.
It is one of my very few non-fictions, but it is super interesting! I currently have two on the go, so hoping to finish one soon so i can blog it!