Converting your manuscript from a PDF file to e-book,\u00a0 can sometimes cause the type or pages to look weird.\u00a0 The problem is likely due to mistakes in your underlying document. Formatting an e-book can be a daunting task and it is getting more and more difficult as technology advances. Your best bet is to go back to your original manuscript and use Microsoft Word for formatting first, before saving as a PDF.\u00a0 Thoroughly read Amazon\u2019s formatting guide here: eBook Manuscript Formatting Guide. Reasons for the mess can be numerous or due to a few critical errors. Amazon points to the following items it considers for rejecting your Kindle file. \u201cCritical Issues \tBody text rendered as bold, italicized, underlined or hyperlinked text \tExtra body text margin padding that is more than 1\/4 of a screen wide \tPrimary content is oriented in landscape mode without any detail page disclaimer \tBody text not set to default color \tForced white text or forced black background that causes text to be unreadable. For example, forcing a code such as Font white will cause text to be unreadable while reading on a white background mode or on an e-ink device. \tIn-line page numbering is present Page numbers entered within the book file break the flow of the reading experience and must be removed. Here are some examples of other formatting issues: \tForced alignment of body text \tThe size of the body text is forced, causing it to be larger or smaller than standard text sizes \tBody text incorrectly changes size \tBullet points missing from a bulleted list \tA list has bullets which appear on a different line that the list contents \tMissing list formatting A best practice is to preserve the reader's customizable reading experience by not forcing formatting for text. Lists without proper formatting can be unintelligible to the reader. \tIncorrectly added line break \tMissing indication of paragraph separation (indentation or single line spacing between paragraphs) \tMissing line break that indicates a section or scene change \tA hard page break in the middle of a section or chapter \tExtract or block quote not differentiated from body text Additional or missing breaks may confuse the reader and break narrative flow. \tSidebar text interrupts a sentence, paragraph, or section \tA footnote interrupts a sentence, paragraph, or section \tAn image interrupts a sentence or paragraph. Improperly inserted sidebars, footnotes, or images can fragment the reading experience, leading to confusion. \tExtra body text margin padding that is less than 1\/4 of a screen wide \tDouble spacing between each paragraph \tConsistent incorrectly added line padding between section\/chapter headings and first paragraphs Readers should set their own reading preferences and not have to page forward more than needed. \tSplit monograms; the first letter of each chapter in your book should appear on the same line as the rest of the word. \tIndividual paragraph incorrectly rendered as bold, italicized, underlined or hyperlinked text \tForced black text or forced white background that causes text to be unreadable. For example, forcing a code such as Font black will cause text to be unreadable while reading on a black background mode on color devices.\u201d Here are a few quick tips: \tUse Microsoft Word default settings. \tDon't justify paragraphs. Use ragged right justification to minimize formatting problems. \tDon't hit \u201center\u201d twice after a paragraph to insert extra space or repeatedly to get to your next chapter. \tApply default styles such as \u201cHeading 1\u201d to each section or chapter. \tInsert page breaks \tFollow Amazon\u2019s guidelines for images. \tMinimize tables These are the most frequent problems we see in client manuscripts but by no means all. Using the above steps does not always guarantee your Kindle book will remain free of errors as Kindle software is constantly changing. If your manuscript has a complicated layout, consider hiring a professional conversion service. Visit me at www.authorlink.com, or on Quora for more answers and tips.