The "Smashwords Style Guide" by Mark Coker is a comprehensive resource designed to assist authors and publishers in formatting their ebooks for successful publication and distribution through Smashwords. It outlines essential formatting rules, emphasizing simplicity and the proper use of Microsoft Word features to ensure compatibility across various e-reading devices. The guide explains Smashwords' automated "Meatgrinder" conversion process, detailing how it transforms a single Word document into multiple ebook formats and the importance of adhering to specific standards to qualify for the Premium Catalog, which provides wider retail distribution.