For my 2 older dds aged 10 and 8.5. They are both v good readers, the younger one particularly so....so tend to read the same sort of thing.
They have read:
Loads of Enid Blyton - Naughtiest Girl, Malory Towers, St Clare's, Adventure series
Roald Dahl
Little Women plus the 3 books that come after
Anne of Green Gables (plus the ones that came after - dd2 really enjoyed these)
Pippi Longstocking
The Railway Children
Rose books by Holly Webb
My Story (historical stories and diaries)
Judy Blume books
Jacqueline Wilson (lots)
I've suggested Michael Morpurgo but not really interested. Any good suggestions?