The user might be asking for information about a book, a novel, possibly a work that's volume 18 of a series titled "Sombra e Meu Marido Quer Ser Corninho" (The Shadow and My Husband Wants to Be a Cuckold). The mention of "vol 18" suggests a specific edition. They might want to find where to purchase it, a summary, or where to read it. Alternatively, they could be referring to a different context, but the keywords are in a sequence that fits a book title.