Forum: Story Recommendations

I'm looking for a good story (meaning a story you liked) where the main character (any gender) infiltrates a secret (suspected nefarious) organization to find out what they are up to or what they might do. Any time period will do, but the story should be written in English.

Can we get recommendations plsss...

"Tales from the Shack" look for Spooky in the description.

Spooky is...well...spooky. She is disturbing, really. But, very entertaining.