American Gods: The Tenth Anniversary Edition - Neil Gaiman

I knew about the pieces relating to Mr. Wednesday (and Low-Key Liesmith)...

 

But I'm pretty sure Mr. Wednesday just admitted to being involved with Laura's death

 

After apologizing for Laura's death/Shadow's loss:

"The man shook his head.  "If it could have been any other way," he said, and sighed." - pg. 29

(show spoiler)