Only You Can Save Mankind!

We'll be leaving Discworld temporarily for this next meetup and meeting Johnny Maxwell in the book "Only You Can Save Mankind." This is one of the few Terry Pratchett books that I have yet to read, so I'm looking foward to this meetup. Here is a review from Amazon:

"It's just a game . . . isn't it?

The alien spaceship is in his sights. His finger is on the Fire button. Johnny Maxwell is about to set the new high score on the computer game Only You Can Save Mankind.

Suddenly, a message appears:
We wish to talk. We surrender.

But the aliens aren't supposed to surrender—they're supposed to die!"

and

"Johnny Maxwell's life is full of conflict. His parents are going through trying times, and the 1991 Gulf War is raging on his television every night, looking more like his computer war games than a news broadcast. A new game, provided by his hacker friend, Wobbler, is not what he expects. Only You Can Save Mankind is supposed to be an adventure-packed game of killing aliens, but on the first play, the game's newtlike female ScreeWee captain surrenders to Johnny, asking for safe conduct for aliens across the game borders. Now other gamers find only empty spaces when they fire up the game; there's nothing to kill. Johnny's heroic endeavors to save the aliens is a wild ride, full of Pratchett's trademark humor; digs at primitive, low-resolution games such as Space Invaders; and some not-so-subtle philosophy about war and peace. "