I am reading a plot summary of "Wuthering Heights", a story written by Emily Brontë.
One day Mr Earnshaw, father of Catherine and Hindley, goes to Liverpool on business. When he returns, he brings with him a child who has been living on the streets in the worst part of the city. From the moment that Mr Earnshaw takes the child as his son, giving him the name Heathcliff, nothing for the Earnshaw family or the Linton family is ever the same again.
So my confusion is about the verbs in bold. Why did she use the present simple form even she is telling something that had happened in the past?
I'm willing to add more context if needed.