Blindsight and Starfish are both awesome.

Blindsight in particular will also blow your mind.

It'd say Starfish is a great read but it doesn't quite get to mind blowing.

They will, however, drain your trust in humanity to deeply negative levels.

blindsight is really something

Years ago I read the entirety of Starfish on the gloriously Geocities-ass website linked here, and I highly recommend it. Even as someone who has a hard time keeping focus, it sucked me in.