You choose books. Doomsday

The reader's choices determine if survival is possible when intelligent machines rise up in arms against their human creators.

"The world is a shell of its former self. Most of the world's population is gone. You're one of the few lucky survivors, but can you trust the people that remain? Or will you face the bleak future on your own? When you choose what to do next, the choices you make could mean the difference between life and death. How long can you survive in a dystopia?"--From the publisher's web site.

The reader's choices determine if survival is possible when a huge rock hurdles through space on a collision course with Earth.

"A supervolcano has erupted! Its eruption is thousands of times larger than a normal volcano. Huge amounts of lava and ash threaten all life in the area. You're a visitor to the park when the eruption occurs. Will you stay to monitor the volcano, or evacuate to safety? When you choose what to do next, the choices you make could mean the difference between life and death. Can you survive a supervolcano?"--From the publisher's web site.