Fablehaven
A fantasy series that is kind of okay, but it's mostly about two siblings who both get assigned to either the light or the dark side of magic. They still have to be a team, even though they're on opposite sides. The sequel series is called Dragonwatch.
'I hate my brother. He got the light side. I got the dark side. It's not fair.'
'This book is like being stuck with your annoying sibling for an entire year.'
'I'm still reading this because my teacher made me.'