Will you be lost if you read twilight 2 but not the first book?

you would be pretty lost. the first book explains a lot about who edward is, about forks (the place Bella moves to), the cullens, Bella's friends, la push, Jacob black, etc. if you just read new moon with out reading the first book, you'd have no idea what they were talking about, that you'd be confused and probably pretty bored. if i were you, i'd read all the books in order!