The Man Who Was Thursday by G.K. Chesterton
— feeling alien
The description calls this book a thriller.
I didn't get thriller from the story. Then again, I am not sure I even GOT the story.
It seemed like a giant metaphor. The guys were named after the days of the week. Sunday was basically the men of all men though. Thursday, our protagonist. also known as Syme, was an odd fellow. I think it was him that kept my interest and seeing what would happen to him next. He seemed to find trouble at every turn.
I didn't fully get the story but it was still enjoyable. Strange as that may seem. Won't be looking for more from this author any time soon though. I prefer more modern writing.