Crazy Daisy by Jonathan Dunne
It is always night in the cave. Take my cold hand.
Weeks before young Fern Keegan sees what she sees in the river tunnel during the Old Castle floods, a deranged patient, Gabriel Bogdan, makes an outrageous claim nobody at The Hillside psychiatric hospital believes until it’s too late.
Thirteen years later, a school tour in the local cave unravels into blind terror when the teachers and students realise they are not alone in the flooding underground chasms of horror.
The river runs through it, and the river runs deep.
My name is Daisy, but you may know me as Crazy Daisy.