Reddit mentions of Rokka: Braves of the Six Flowers, Vol. 1 (light novel) (Rokka: Braves of the Six Flowers (Light Novel) (1))

Here are some recommendations for some other novels with detailed magic systems.

• Unsouled is the first book in Will Wight's Cradle series. Will’s series emphasizes intense action and long-term character growth. They’re much shorter and faster paced than most of the other options on this list.
  
  
• Mother of Learning is about a novice mage who gets stuck in a month-long time loop. The magic system is something of a mix between D&Dish schools of magic and anime-style training exercises. We learn more about the magic system as the protagonist does. Lots of fun twists on the genre in there, too.
  
  
• Rokka: Braves of the Six Flowers by Ishio Yamagata is fantastic if you enjoy fantasy mixed with mysteries. Not all of it has been translated yet, but the first couple books are out.
  
  
• Worm is a web serial about a young girl who develops super powers. It's dark, internally consistent, and features characters that use their abilities at least somewhat intelligently.
  
  
• Sufficiently Advanced Magic is one of my own books. It's a magical academy novel, but with a style inspired by anime and Japanese RPGs like Final Fantasy, the Tales series, etc. It's very heavy on the magic system side of things, with the main character spending a fair bit of time in classes and studying to learn how magic works. If what you’re looking for is a story where learning how to use magic creatively is a major focus, you might enjoy this.
  

I haven't actually received it in the mail yet, but I recently ordered a MiG-21 Balalaika Action Figure from Schwarzesmarken for my daughter's birthday and the first volume of the Rokka no Yuusha LN translation for myself.