It sounds like you're looking for related to the famous "Harmony 4" course at Berklee College of Music, specifically its PDF materials.
: Techniques for maintaining a constant bass note or melodic pattern against changing harmonies. Advanced Chord Structures harmony 4 berklee pdf
The search volume for this specific term is high for several reasons: It sounds like you're looking for related to
Modal harmony, deceptive resolutions, and non-functional harmony specific topic exploring the theoretical concepts
This article dives deep into the curriculum of Berklee’s Harmony 4, exploring the theoretical concepts, the value of the source material, and why the search for the "Harmony 4 Berklee PDF" remains a rite of passage for music students worldwide.