Your publication should comply to one of the following Style Guides: APA (tutorial), MLA (tutorial), or Chicago (tutorial). PDF Specifications We support PDF v1.4 and lower. Embed all fonts and images in your PDF file prior to submission. Submitted PDF files may contain bookmarks, comments, invisible objects, or metadata. PDFs should be optimized. Optimization is useful to reduce your files size, allowing for higher performance when transferring, uploading, viewing and printing the files. If scanned pages or scanned graphs are included in file, all scanned images with of text should be OCRed using the Adobe Acrobat OCR embedded feature. Common Points of Failure Crop marks or other printer's marks should not be used on any files. The book description should be in compliance with the rules listed here. Missing Pages Title missing on the front cover Incorrect pagination Books with typographical errors, such as misspellings or poor grammar.