And I was thinking of starting them on the Science Fiction journey...
The oldest nephew is 9. He's loved everything I've given him so far (last series was Charlie Boone...). The oldest niece is 13. I started her on the YA Pratchett (Tiffany Aching series) and she loved those.
Any recommendations on what next? Their moms won't let them read Harry Potter, so no go on that. I have the whole set of Artemis Fowl as well.
Any YA science fiction with a strong female protagonist?