Create an easy to navigate Table of Contents
In order to have a fully functional Table of Contents page inside your book, you will need to create one inside your document. However, note that even without creating this page, if you have formatted your chapter headers properly, when users read your book using our app or devices, they will be able to navigate to the various chapters of your book using a built-in navigation function.
Validate your ePub file
When submitting an ePub file make sure your file is validated without any errors. Errors in files can cause display issues on our devices and also prevent your book from being distributed to our Partner sites. You can use this free ePub validator (http://validator.idpf.org/) to check your file for validation errors. If your file has errors that you are unsure of how to fix, please feel free to reach out to the Kobo Writing Life operations team (email us at email@example.com) and they will be happy to take a look at your file.
Include Kobo specific links in your files
We encourage all authors to include links to their backlist in their ePub files. However, we recommend that the links used are retailer specific. When a Kobo readers finishes a title and selects another title from the author in their ePub file, it is beneficial to both author and reader that they link directs them to a retail site they have already purchased a title from.
Include correctly labeled series information
Metadata for series are extremely important. Series information, while you assume would be helpful to be in the title and/or subtitle fields, is actually quite confusing to our customers. Having series information in multiple locations on a product page is often distracting to our customer and often times they are unable to tell the title order of a series. Kobo encourages that series information only be included in the “Series Name” and “Volume Number” text fields. This will minimizes customer confusion and also allow for all the titles in a series to be linked together on our website. Remember, if a person unfamiliar with your series is unable to identify the first book, your metadata is too complicated.
As mentioned in the BIC Statement on Best Practice for Subtitle Field in Metadata Feeds, metadata fields are not places to include your tag words. Tag words such as Contemporary Romance, Bestseller, Thriller, or Small-town Romance should not be included in your title, subtitle or series fields. Text listed in the Title and Subtitle fields should match the text present on the cover image (Series information should however be listed in the respective Series Name and Volume Number fields). The use of these extraneous words in your metadata lead to confusion and corruption of metadata standards. We respectfully request that you ensure your catalog of titles do not include such details so that the Kobo catalog can offer the purest experience to our customers.