The Martian: A Novel by Andy Weir: I finished this book in less than 24 hours. A friend recommended it to me, saying that never in her life did intense geometry and space talk seem so suspenseful and interesting. She was right. This book is a gripping sci-fi read, but you don't have to be a sci-fi buff to like it. Main character is a bit of a science bro, and there are a few 'did you have to go there' gender moments. Strong recommend, though.
My first hosting was for this book. Really a fascinating read, historical fiction following Hemingway's first marriage from the prospective of his wife. Very sad, since it is essentially about its dissolution.
Brain on Fire: My Month of Madness by Susannah Cahalan. "The true story of a healthy young woman who had her entire world shattered by a mysterious infection in her brain. She had no memory of her illness and used her investigative journalism skills to discover exactly what had happened to her."