Vector layout of A4 cover mockup design template for brochure, flyer layout, booklet, cover design, book design, brochure cover. Halftone effect decoration with dots. Dotted pop art pattern decoration.. Vector layout of A4 cover mockup design template for brochure, flyer layout, booklet, cover design, book design, brochure cover. Halftone effect decoration with dots. Dotted pop art pattern decoration