Back in elementary school (1994-1995) we had books called "readers" that contained short stories or excerpts from novels. One story was about a guy who had a time-travel device that was the size of an egg (or egg-timer?) and had a control dial. He was trying to figure out how to use it, and in the process jumped around in time. Three things I remember:
- He time jumps into the (post apocalyptic?) future where there is green gas everywhere. He starts coughing and believes it to be poisonous so he time jumps.
- He time jumps into his bathroom where his future self is taking a shower. His future self doesn't act surprised and gives him a quick run down on how to use the device.
- Every time he time jumps, he feels faint. The author uses this word italicized to summarize his time jump ("Faint").
That's as much as I remember. I would really like to read the rest of the book. Thanks!