Artemis is a city on the moon, and consists of several bubbles. The main character is a woman I thought was a seventeen-year-old girl for most of the book. She nearly kills everyone, but (SPOILER) ends up saving everyone from her almost killing them. Not a complicated story, and maybe the writing could be a little more better, but it did the job and was fun to read. I may even give The Martian a try!
Earth's sun is threatened by some space-creature that eats it, or something. Grace (last name) goes on a one-way trip to another star to see why it isn't threatened. Very good story, lots of science, but very readable. Great ending.