KDP Builder

After the last chapter comes a second finish line nobody mentioned: a spine width, and margins that survive the printer's cutting machine. KDP Builder covers the writing and that second stretch, and ends with files ready to upload to Kindle Direct Publishing, Amazon's self-publishing service, or to IngramSpark and Lulu. You pick a book type, which can be a novel, a memoir, a sudoku or a coloring book, and describe the topic and the readers.

Optional market research looks at competing books before an outline and title options appear. The AI then drafts the chapters one at a time, and you edit each one and lock it once it reads right. Later chapters take the locked text as context so the voice stays the same, and editing passes for grammar and flow run once the whole draft is there.

Every book also opens in a drag-and-drop design studio with 161 cover templates and AI tools that erase objects or extend a background. The paperback wrap gets its spine width from the page count and paper type.

The footer states that KDP Builder is independent of Amazon, which asks authors to declare AI-written content at upload. Each export carries a reminder about that declaration. The download bundles the covers, an interior PDF, EPUB and DOCX files, and a text file holding the description, seven keywords and categories.