The Time Machine - H. G. Wells

When the Time Traveller courageously stepped out of his machine for the first time, he found himself in the year 802,700–and everything has changed. In another, more utopian age, creatures seemed to dwell together in perfect harmony. The Time Traveller thought he could study these marvelous beings–unearth their secret and then retum to his own time–until he discovered that his invention, his only avenue of escape, had been stolen.