The [https://medium.com/@ravencoin/ravencoin-4683cd00f83c Ravencoin medium post] explains some of the early reasons for creating Ravencoin and what it hopes to achieve.
[https://github.com/RavenProject/Ravencoin/blob/master/roadmap/README.md The roadmap] for the code development was published on the projects [https://github.com/RavenProject/ github] on the 3rd April 2018. Testnet asset functionality was launched on 30th July 2018 - further details can be found on [[Testnet the testnet page]].
A whitepaper type document describing the background and intention of the project was published on the same date on Ravencoin.org [https://ravencoin.org/Ravencoin.pdf here] and Bruce posted a [https://twitter.com/brucefenton/status/981564543749971968?s=19 Twitter thread] summarizing some key points of the whitepaper and growth of the project to date.