Resolved Help me find a book

I doubt that this book/book's are on nu, but i will ask al the same. It's probably been about 10 years since i read it.

It starts of with a teenager mc in a mental hospital after he saw a demon/devil murder his parents and his sister after they lost a game of chees. His uncel helps him get out of the mental hospital.

 

What language it is in? Arabic?

 

Sounds like the demonata series if it is not asian.

 

Specifically the first book Lord Loss.

 

Thanks, it is demonata.