Once you've finished all levels of editing, sent your manuscript off to layout, and received the first version of your interior book file back as a PDF (called a digital proof), you enter an important new phase of your publishing journey. Add your front cover to the top of that file, and you now have a key asset to share—an Advanced Reader Copy (ARC). For authors, ARCs are one of the most effective tools for building prelaunch buzz, gathering early reviews, and creating a strong foundation for a successful book launch and optimal sales.