This is the sequel to Twilight. The story continues with some unpredictable twists. There are more supernatural characters and there is way more teenage angst :)
This novel is PG at worst. I really like Meyer's willingness to avoid the easy clichés of bad language and sex. The book does have some violence, but it's about monsters so you have to expect a little. However, this is still a teen friendly book. Highly recommended.