I think that every so-called history book and film biography should be prefaced by the statement that what follows is the author's rendition of events and circumstances.
— Barbara Kruger

It is worth remembering that every writer begins with a naively physical notion of what art is. A book for him or her is not an expression or a series of expressions, but literally a volume, a prism with six rectangular sides made of thin sheets of papers which should include a cover, an inside cover, an epigraph in italics, a preface, nine or ten parts with some verses at the beginning, a table of contents, an ex libris with an hourglass and a Latin phrase, a brief list of errata, some blank pages, a colophon and a publication notice: objects that are known to constitute the art of writing.
Jorge Luis Borges prefaces quote

Shaw's plays are the price we pay for Shaw's prefaces.
— James Agate

Generally, if you preface an interview request with, 'I'm an author writing a book,' for some reason, that seems to open a lot of doors.
— James Rollins

NOT to my contemporaries, not to my compatriots but to mankind I commit my now completed work in the confidence that it will not be without value for them, even if this should be late recognised, as is commonly the lot of what is good. For it cannot have been for the passing generation, engrossed with the delusion of the moment, that my mind, almost against my will, has uninterruptedly stuck to its work through the course of a long life. preface to the second edition of the world as will and representation
— prefaces quotation by Arthur Schopenhauer