Check IMSLP (Petrucci Music Library) for public domain classics like Rimsky-Korsakov.
For those specifically searching for "книги по аранжировке" (books on arrangement) in Russian:
If your goal is pop, jazz, or film scoring, these titles focus on groove, song structure, and MIDI orchestration. skachat knigi po aranzhirovke
A legendary Soviet-era book that remains highly relevant for anyone writing for brass sections or jazz bands. Where to Find and Download
The ultimate gold standard. It teaches how to achieve balance and color in an ensemble. It is widely available in the public domain for free download. Check IMSLP (Petrucci Music Library) for public domain
These books provide the "DNA" of arrangement, covering instrument ranges, textures, and harmonic movement.
A modern masterpiece. It’s more contemporary than Rimsky-Korsakov and includes extensive examples of how different instruments interact. Where to Find and Download The ultimate gold standard
Known for its clear, systematic approach to the technical capabilities of instruments. Modern & Commercial Arrangement