That’s because Diana’s fifth novel takes place solely in the past.
Set in the late 18th century, specifically the 70s, The Fiery Cross keeps the action in one spot.
This isn’t to say the topic of time travel isn’t brought up throughout the novel, however.
After all, the fourth season’s finale set up a tantalising storyline involving Otter Tooth and his time-travelling ways.
source: express.co.uk