Return of the Spider

I'm curious whether this was planned from the beginning or a decision made during writing to bring back a fan-favorite. Did it change the story's direction?

The story moved so quickly that I barely had time to breathe. Was this speed intentional to heighten suspense or a natural result of the plot?

Sometimes I feel like the characters get lost in the chase, but here they felt real. Curious how the author manages this balance in writing these high-speed moments.