The Time Traveller: Book 2

Fresh from his success in getting his time machine up and operational, the Traveller finds himself and his two companions in trouble when they are visited by, and attacked by, beings called the Brotherhood. Sue reveals a deep surprise which turns out to be the cause for the attack. Then when the Traveller and his companions decide to pursue the Brotherhood, they land in a world of white and death.

This is the second volume in the Time Traveller series.