Good places to start are the Machine Intelligence Research Institute's Research Guide (https://intelligence.org/research-guide/), which summarizes the aspects of the problem they've worked on and think are important; and the Future of Life Institute's Research Priorities (http://futureoflife.org/static/data/documents/research_prior...), particularly Section 3.
"— He is very, very concerned about AI. I quoted him in my posts on AI saying that he fears that by working to bring about Superintelligent AI (ASI), we’re “summoning the demon,” but I didn’t know how much he thought about the topic. He cited AI safety as one of the three things he thinks about most—the other two being sustainable energy and becoming a multi-planet species, i.e. Tesla and SpaceX. Musk is a smart motherfucker, and he knows a ton about AI, and his sincere concern about this makes me scared."
from: http://waitbutwhy.com/2015/05/elon-musk-the-worlds-raddest-m...
Anyone who is not scared shitless of what's to come simply does not truly understand what AI is capable of. If you're one of those people, do not compare AI to ANYTHING that you are familiar with today in regards to computers/software.
Superintelligent AI will be like a god that knows your inner thoughts, desires, hopes and dreams as well as nearly everyone else on earth. It will manipulate people with ease - it's not even an issue. Whatever it wants to accomplish, it will, with or without human approval.