The name of the book is not copyrighted. Just the idea in the book.
There could be 100s of books called "The Cell"
As long as the books aren't about cellphones turning people into zombies, then they are fine.
There are 1000s of books out there with the EXACT same title as each other.
Depends on your definition.
There were many "games" created on computer, even before PONG.
There was a tennis game created back in 1954, using an Oscilloscope.