Tertulia’s co-op bookstore (tertulia.com) features books that are distributed through Ingram Content Group, one of the world’s largest book distributors and parent company of the self-publishing platform Ingram Spark.
If your book is available in Ingram’s catalog and marked for distribution, it will automatically appear on the Tertulia bookstore site without you needing to do anything else.
If your book is not available currently on Tertulia.com, it would most likely be the case that your publisher or publishing platform has not configured your book for expanded distribution through Ingram.