And When She Was Good, by Laura Lippman

The story of Helen/Heloise Lewis, a rather secret person who leads a very complicated life. Helen is a young woman with an abusive father who leaves home with a young man who is no better. Later in life we find Heloise, nee Helen, running a successful "escort service." She has, along the way, made some questionable decisions and involved herself with some very dangerous people. All of this is beginning to come together as we enter this captivating novel. I read this in a weekend, it was just great.

Girl on a Train, by Paula Hawkins

This book contains pure evil. It's a very effective thriller, captivating, written in an innovative style that suits the subject matter very well.

Rachel is the girl on the train, a young woman who rides to London, passing the same houses every day. On the terrace of one of them, she frequently observes a young couple whose life seems idyllic. That changes.

Furthermore, we learn much more about Rachel, as well as the other principle characters in this book, and we are led expertly down the path of mystery and suspense to its amazing conclusion.