Rework the rectangle. Consider creating a brochure that’s square or round. Printers often have pre-made dies in several sizes to round corners or cut a custom shape that can add character to your design.
Creative Portfolio is a 18 pages Indesign brochure template available in both A4 and US letter sizes. This template is for use as a portfolio / book / extended resume / agency or studio brochure. Download: http://graphicriver.net/item/creative-portfolio/11001973?ref=ksioks