Non-fiction, “adult” reference books on foxes

Hello, book Reddit! I’ve been on the hunt for non-fiction reference books on foxes, but all I can ever find is YA fantasy or children’s picture books on foxes. Does anyone here— or in another subreddit that I can be directed to— have recommendations of informational, non-fiction, reference books that delve into the biology, ecology, psychology, &/or behavior of foxes that isn’t child-oriented?

Much thanks!