I read this book along with a few others to celebrate banned books week at the end of this month. I haven't read too much of Judy Blume but I know a lot of her work 1. is considered classic 2. have been banned and challenged. 
 Forever ended up being a very fast read for me, both the story line was interesting and the writing style is great. She writes in a way that makes it easy to get into a story, and can work great with kids who aren't strong readers. Blume also writes realistic types of stories, stories that don't always have happy endings, or even sad endings, but real endings. She knows how to get in the minds of her intended audience and write about the daily thoughts they have, the subjects they care about, and she captures the voice perfectly. This book is definitely for older or mature teens; it was a lot more graphic than I had expected. However it didn't contain the same types of scenes that you'd find in romance paperbacks. 
 Another Judy Blume book I just read was "Are You There God? It's Me, Margaret" which is also a realistic type of story but on a different subject, and much more relevant and appropriate for younger readers. Overall, I'd recommend both stories for anyone and everyone and I look forward to reading much more of Judy Blume's work!