This is the first in a series by Martha Wells. The book has won numerous awards including a Hugo and Nebula.
Murderbot is a self-given name of a security robot. It is a hybrid of cloned organic and inorganic parts that include weapons, armor and communications equipment. He has no sexuality. And the story is told in first person from his point of view. His internal dialog feels alien.
This one had a problem with its control module and was able to bypass it, giving it a certain amount of autonomy.
The story involves a science team surveying the flora and fauna on a planet. When they discover parts of the maps of the world are blank, they investigate, to discover another team that was killed by their security bots.
The planet was home to a dead civilization, someone wants to keep that secret, profits provide the motive. Murderbot comes up with a plan to keep the scientists alive, who purchase his contract and give him his freedom.
The story is short, well-told, and not predictable. It makes the me look forward to the next book.