Romance, Mystery, Paranormal, Dystopia, Fantasy
Wikipedia's definition of the New Adult genre:
In New Adult the protagonists are in the 18-25 age bracket.This age group is considered to be the lucrative 'cross-over' category of young-adult titles that appeal to both the young-adult market and to an adult audience.
New adult literature touches upon many themes and issues to reach the readership that falls in between the categories of young adult and adult fiction.
Many themes covered in young adult fiction such as identity, sexuality, depression, suicide, drug abuse, alcohol abuse, familial struggles, bullying are also covered in new adult fiction, but the various issues that are dealt with in the category hold it separate. Some common examples of issues include: first jobs, starting college, wedding engagements and marriage, starting new families, friendships post-high school, military enlistment, financial independence, living away from home for the first time, empowerment, loss of innocence, fear of failure, and many others.
This category focuses heavily on life after an individual has become of legal age, and how one deals with the new beginnings of adulthood. Commonly, these themes and issues have been seen taking place post-high school in popular new adult fiction titles, but there are exceptions.