It is published and still on sale. I think the laws regarding making books based on your crimes is different in the UK, where Ian Brady is located: http://www.amazon.co.uk/Gates-Janus-Analysis-Englands-Criminal/dp/162731010X/ref=sr_1_1?ie=UTF8&qid=1440339444&sr=8-1&keywords=the+gates+of+janus
I don't know of any others. However, I think Dennis Rader is in the process of writing one about how victims can protect themselves from people like him. Strange.