Looking for books where the protagonist uses unconventional tactics or strategy against better positioned, equipped, or otherwise stronger adversaries.

My last post got removed because I didn’t include enough body text. I don’t really know what else to add. Please only suggest good books? I hope to find a novel to read, but I really like short stories too. This request is deliberately very broad. I don’t like knowing exactly what I’m getting into when I read a book, so if you know a book that only kinda fits, please leave a comment to suggest it.

by HenryGeorgeWasRight_