Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks Magnot secret liar

Managed to locate the lair and also discover the missing imp slave. There's a room with a blood stone which I cannot locate the switch. How to open the wall?

There is a book in the room you need to read.

You mean the book in the locked room? That's the room I need to have access. There is no hidden switches to activate the sealed door.