Copyrighted book from my publishing house has been posted by an user. HELP

Hi! My name is Julyana and I own a publishing house based in Brazil. An user has posted at your website a link to download a book from my publishing house that's protected; copyrighted!! Without our permission. The content is at https://www.imdb.com/pt/list/ls594379026/ It's a brazilian book in portuguese called Agenda Estoica. It can't be there!!! He's unauthorized!!!! I really want you to remove it for violating our rights and also the author's!!!!!! Hope to be hearing from you soon. Hope to be hearing from you soon.