What good books are there for 12 year olds?

Girls:

1) Twilight series.
2) Jacqueline Wilson books.
3) Louise Rennison
4) Diary of a Chav & diary of a snob. ;)

Boys:

1) Doctor Who
2) Anthony Horowitz books (Alex Rider series which are like James Bond but of a fourteen year old teenager who works for M16 and the five which are a 5 children with special powers throughout the books more are introduced.)
3) Fantastic four and Spider-man :D
4) Maybe the Twilight books some boys don't enjoy these though.

Both:

1) The series of unfortunate events.
2) Harry Potter books
Hope this helped! ;D