BOGO Cover Mockups Posted on March 2, 2021March 2, 2021 by LiteraryBrand Buy one book Cover Mockup, get a second mockup FREE! No code needed. This offer ends March 02, 2021 11:59p ET. Learn More / Special Offers Hits: 19 Posted in LiteraryBrandAdvertising.Com and tagged cover mockups, literary brand advertising.