Misc: in wwii, when did russia declare war on japan?

Questions

Novel featuring a writer held captive by a psychopathic fan?

Eventually causes the demise of the dark man in The Stand?

In The Addams Family, this AI-enabled flipper will make the shot for you?

Rudy the dummy says "It's only pinball!" in this 1991 machine?

This Premier game designer of "Lights, Camera, Action" fame was once just a fan?