The International Digital Publishing Forum is the trade and standards association for the digital publishing industry, which includes e-books. Their members included industry giants like Ellora's Cave Publishing; Fictionwise, Inc; HarperCollins; McGraw-Hill Professional; Random House; and Time Warner Book Group. Their mandate is to gather information, share data, and promote e-books as a practical alternative to print books. The IDPF works to introduce consumers to the benefits of e-books. Self published authors who also sell e-books should review the IDPF site for new marketing venues and promotional tips.