Best book on frugality? Niche is okay.

Greetings fellow humans. What’s your favorite or top recommendations on a frugality book, even if it’s niche (example: just kitchen topics) and preferably inexpensive or even free.

This post is motivated by the thought “gee, I wish the best Reddit Posts in this forum were summarized in a nice little ebook, all categorized and indexed and searchable” … and comes with a $20 dollar gift certificate to my local smoke shop. /s

Mad respect if anyone replies with “Steal This Book”… though it’s a bit dated, you can find that gem on archive.org, btw.

Press on. Fight the good fight. And VOTE.