As well as her critique of the Twilight series, Blythe Toll has written a study guide on each of the four books which you can download here to use with young people who are into the series. You will of course want to adapt them to the specific needs of your group, and to check they are age-appropriate, but these are an excellent resource for exploring the themes of passion and desire that are so strong in the books. The character profiles will be useful whichever study guide you decide to use.
Blythe Toll is an artist based in Melbourne, Australia. She has been involved in youth work of some description for 10 or so years, and currently works for Urban Seed - a Christian-based organisation working with the homeless and marginalised people in the city of Melbourne. There she is involved in the education department, speaking to some 10,000 students about homelessness and other urban issues.