You keep copyright of your book at all times. If your book is just for sale on FeedARead.com then login and click Go next to your book title and then click the button to make your book private on site, this will make it no longer available to view and order by readers though you can order author discount copies still if you wish.
If your book is also available for bookseller distribution on bookseller websites, please email cancellations@feedaread.com with your book title and we will contact the printers so that it can no longer be ordered by booksellers. Some booksellers such as Amazon will usually continue to list a book even if cancelled according to their own separate company policies because they enable resellers and/or because they sometimes may have previously bought a small stock of print-on-demand books to enable quick delivery to book buyers which they are then entitled to sell. This applies to how they work with all publishers books. The royalties of cancelled books will be paid to the author at the next applicable royalty report period i.e. the third week of April or the third week of October as applicable.