The Raiken, despite being militaristic in nature, have a rich culture. Though their literature, art, and music is mostly directed towards praising the Sentinels, and depicting their past, some of their culture is outward ideas, though not many fantasies, as the Raiken have everything they could dream about, besides the Final Ascension.
-Literature-
Religious Literature
The Final Ascension by Rishin Faith Bringer is the widely used book on the Sentinels. Studying their relics, machines, and wreckage they wrought, Rishin Faith Bringer writes that the Sentinels discovered the final stage, and ascended past their world. This is the Bible of the Raiken, and is used at gatherings.
The Lost Ones by Nyll the Believer questions that some Sentinels may have been left behind, and the Clockwork Cluster, or the Lost Region is where they find sanctuary. Met with mixed emotions from members of the religious order, the Lost Ones borders on heresy, however, it is accepted by many, as a wild dream, that may, or may not be true.
Chosen by Samas Hope Carrier writes an extensive analysis on the Sentinels and their connection with the Raiken. As generally believed by the population of Raiken, the Sentinels "chose" the Raiken for evolution, and a place of power and leadership among the stars, when they left on their "Ascension".
Historic Literature
The Roamers by Charad Knowledge Keeper describes the lifestyle and history of the early Raiken on Oushino. It covers from their start of life, to the construction of their first city, Lunaxus. Considered the authority on early Raiken history, it is widely read by historians and regular people alike.
The Greatest Step by Vuron Stargazer records the steps leading up to the development of the Spaceflight engine. Considered the greatest step ever made by Raiken, this book is honored for it's extensive coverage on the technology, people, and materials used to craft the first Spaceflight engine.
Analysis on the Century of Darkness by Delas the Reasoner, sheds light on the FIR Rebellion, commonly known as the Dark Century. Delas is a rogue Dralu, so his writings are generally cast aside by most Raiken, however, those who read it discover the horror of the standard of life under Raiconian slavery. It also glorifies the FIR Heroes of the rebellion, and all Raiken appreciate valor in battle, no matter what race.
Common Blood Spills by Vorsach the Reminder, is a memorial to the Raiconian Civil War, and the Raiconian Alliance that emerged from it. It is a story of dissent, hatred, and bloodshed, but also about hope for a better tomorrow, and unity.
Other Literatures
Beyond the Stars by Torine the Outlooker, is an inquiry to new galaxies and systems beyond Sentinels Overwatch. This is a chief reason the development of an experimental space engine began, as it questioned that the galaxy they were in was not the only one, and this inquiry led scientists to test this theory.
The Protectors by Ray'Kel Dreadstriker, is a children's book that depicts the military and Sentinels protecting the Raiken. Teaching children about main aspects of Raiconian race, and written by a military veteran, it is read to Raiconian children everywhere.