If you are determined to read the light novels, here is a practical, step-by-step guide:
For many years, the series was not fully licensed for an official English release, leading fans to search for fan-translated versions in PDF format. This is common with long-running light novel series that gain international popularity after an anime adaptation. Where to Find the Light Novels saiunkoku monogatari light novel pdf
The Purple Palace Shines Bright (Shi Shi no Miyako wa Kagayaku) If you are determined to read the light
Even though English PDFs are restricted to fan translations, you can still support the original author, Sai Yukino, and illustrator, Kairi Yura, through several legal avenues: here is a practical