Spines

Spines offers a platform for authors to publish their books, which includes tools for formatting and cover design (akin to a rich text editor for book creation). They have various pricing plans that act as a form of membership for authors to access their services and distribution channels, which can lead to royalties (monetization). They explicitly offer audiobook creation as a feature. While they distribute through major channels like Amazon and Barnes & Noble, and mention metadata optimization, the website doesn't detail a specific recommendation engine or reader engagement metrics beyond royalty reports. The focus is on author services rather than a reader-centric content discovery platform.