All Systems Red - (Murderbot Diaries) by Martha Wells

Murderbot is a self-aware SecUnit that has hacked its own governor module, and refers to itself (though never out loud) as "Murderbot." Scornful of humans, all it really wants is to be left alone long enough to figure out who it is.

But when a neighboring mission goes dark, it's up to the scientists and their Mu to save them.

Will Murderbot be able to overcome its programming and help the team? Find out in this gripping science fiction adventure!