What's the Name of That Book??? discussion

I remember that there were people trying to prevent some sort of disaster and they got to this island owned by this rich guy and somehow nanobots got out and they only consumed biological matter and the good guys were trying not to die by nanobot

Is it a short story called The Infinite Matrix by Richard Kadrey?

Prey?

Not a short story, it was pretty long

I think it IS Prey! Thank you so much!!!

Plot details added to header. This could help someone find the same book in the future.