SOLVED. Smart young girl, high school, no real friends, obsession with the word cincinnati, says nay a lot, conspiracy at school, teacher called 'Try Fontaine''. [s]

[Karen]

This book is about a girl, with a name that sounds something like Bindi I think. She's very smart, says nay instead of no a lot and doesn't have many friends at school, and is weirdly obsessed with the word Cincinnati. She has a brother and her parents fix houses, fix them up then sell them. She knows how to speak German. She is chosen for something at school that involves her talking to other students she doesn't usually talk to and a teacher or counsellor called Try Fontaine is involved. I think she suspects that there is something fishy going on at school, but brushes it off. She is right, and she finds herself kidnapped or held hostage at the school, but I think someone from her class gets her out or finds her. I think the title is a question such as 'Who killed ______ or Who hurt ____ (I don't know her name for sure. Please help me out!

[Andria]

The Murder of Bindy Mackensie, by Jaclyn Moriarty?

[Karen]

Andria wrote: "The Murder of Bindy Mackensie, by Jaclyn Moriarty?"
That's the one, thank you very much!

[Andria]

You're welcome! And now that I'm on a computer instead of my phone, here's a link:
The Murder Of Bindy Mackenzie