I can't find what I want.

I want a simple online book group with discussion forum for children aged 11-16, where we can get together to discuss books we read in common.

If one doesn't exist, or there are none recommended to me that are useful, I'm setting one up.

I don't want it tied to a publisher. I don't want it on Facebook. I don't want it promoting National Curriculum attainment targets. I don't want it aimed at parents. I don't want it to be patronising. I don't want the interface gadget-driven, noisy, or filled with pointless buttons. And I don't want ads.

Is there anything already out there, before I re-invent the wheel?