A document which describes a proposed endeavor (venture, undertaking), such as a literary work (which one proposes to write).
A booklet or other document giving details of a share offer for the benefit of investors.
A document, distributed to prospective members, investors, buyers, or participants, which describes an institution (such as a university), a publication, or a business and what it has to offer.
A book about travelling to a certain region, such as a memoir or guide book.