The Time Tunnel by Murray Leinster

The Time Tunnel is a TV tie-in novel written by Murray Leinster. Quite a few well-known very good authors ended up writing such books as their usual markets started to dry up. TV tie-in novels sometimes had a feel that was subtly different from the series. It was not unusual for the first tie-in novel associated with a series to be written before the series actually went to air, with the author…