Leather Compendiums - Premium Corporate Gift Idea. Leather compendiums make great corporate gifts for clients. Corporate gifts can be tricky so make sure yours will impress client or customers. Promotional Product Experts branded leather compendiums are truly impressive business gifts. Made with premium quality leather, these custom leather compendiums exude elegance and are practical with features like pen loops, A4 pads for note taking, internal pockets for business cards and other important documents.