So, my first book is published and I'm writing my sequel. I came across a huge problem. The whole series is for mainly young adults, but I've had readers from 18 to 85 that are happy with it. The problem is that the main characters in the first book are adults, and therefor the book itself is easily understood and enjoyed by adults. The sequel is centered around teenagers. After writing the first book, as I write the second I feel like everything I'm writing now is childish and silly. In fact I feel like the characters themselves are... well childish and silly, but on the other hand they are teenagers, going through high school, and they are being forced into adult situations. The whole thing is just very conflicting in my mind. Now I'm to the point where I have no idea how to fix this, or if there really is anything to fix or if it's just me being silly. Any advice at all would be HUGELY appreciated.