<p class="isSelectedEnd">Best book publishing companies offer professional editorial, production, distribution, and marketing support for authors across many genres. In traditional trade publishing, the five largest and most influential publishers are commonly known as the Big Five: Penguin Random House, HarperCollins, Hachette Book Group, Macmillan, and Simon & Schuster. Other respected publishers include These independent and mid-size publishers can be particularly relevant for authors whose books fit specific genres or audiences.