This is kind of a weird request – I remember the title and most of the plot,I just need the author name and confirmation that this was either part of a series,based on something,or both. Here’s what I can remember:
1. The name of the book was Caitlin,which was also the name of its protagonist,Caitlin Ryan (like in Francine Pascal’s Caitlin series,maybe the author got the name from there?)
2. I read this one around 2008,when I was a middle schooler,but from the references I remember in it it was published between about 1985 and 1995.
3. Caitlin herself is a high school student somewhere,very committed to her various pet causes. Her latest cause is anti-nuclear proliferation. She makes a friend named Robert,introduced to her by a mutual friend of theirs named Lucy Baynes. I think there’s a character called Melanie or Melody.
4. Robert convinces Caitlin to attend a protest regarding the building of a nuclear power plant wherever it is they live,I think in either the northeast US or Canada. They get arrested for “disrupting the peace” or some such. There’s a long bit where Caitlin is worried about what this will do to her future (she’s about 14 or 15 as I recall).
5. Caitlin has a court date near the end of the book and I believe the judge lets her off with some community service,given that what she did wasn’t very serious. I think Robert gets the same?
6. The reason I’m convinced this was based off of something is owing to the cover having an actual model instead of artwork. The girl on the cover (probably meant to portray Caitlin) has a lion’s mane of brown hair with a blond streak. She’s holding a reporter’s notebook and I think her portrait is surrounded by some others. Based on this I think this book may have been an adaptation of either an after-school special or a TV episode.