Well, a satire is something that makes fun of the stupid things humans do. So satirical refers to a book, essay, or something that does that.
a genre using derisive humor to ridicue human weakness and folly or attack political injustices and incompetence. Satiric comedy often focuses on ridiculing characters or killjoys, who resist the festive mood of comedy, such characters called humors, are often characterized by one dominant personality trait or ruling obsession