A white paper is an authoritative report or guide that informs readers concisely about a complex issue and presents the issuing body’s philosophy on the matter. It is meant to help readers understand an issue, solve a problem, or make a decision. The initial British term concerning a type of government-issued document has proliferated—taking a somewhat new meaning in business. In business, a white paper is closer to a form of marketing presentation, a tool meant to persuade customers and partners and promote a product or viewpoint.[1][2][3] White papers may be considered grey literature. (https://en.wikipedia.org/wiki/White_paper)

An electronic book (or e-book) is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices.[1] Although sometimes defined as “an electronic version of a printed book”,[2] some e-books exist without a printed equivalent. Commercially produced and sold e-books are usually intended to be read on dedicated e-reader devices. However, almost any sophisticated computer device that features a controllable viewing screen can also be used to read e-books, including desktop computers, laptops, tablets and smartphones. (https://en.wikipedia.org/wiki/E-book)

A brochure is an informative paper document (often also used for advertising), that can be folded into a template, pamphlet or leaflet. Brochures are promotional documents, primarily used to introduce a company, organization, products or services and inform prospective customers or members of the public of the benefits. (https://en.wikipedia.org/wiki/Brochure)