悪党パーカー/裏切りのコイン (ハヤカワ・ポケット・ミステリ 1439)

The character's choices felt complex and realistic, but I'm curious what inspired the author to give him such a layered personality.

I loved the tension but found some parts a bit sluggish; was that intentional to build suspense or just me?

The atmosphere really added to the mood, and I'd love to know if the city is based on a real place or entirely fictional.