Good Place Or Book To Learn About Counterpoint With Homophonic Textures?

Hello everyone

I would like to learn about applying counterpoint to large ensemble work. One technique in particular is counterpoint with homophonic textures. For example; a melody that is a group of three notes moving in parallel (so it's all one unified movement) with another melody that is also comprised of three notes moving in unison, and then applying 2-part counterpoint techniques treating both sections as single melodies.

Do you know of a book that helps give insight on this technique?

Thanks for your time

First and second species counterpoint. Look at pretty much any book or online article on the subject and you'll find info. 

It's not a technique. The same rules apply regardless of texture. Just be aware that doubling sounds different from countermelodies, and keep the two contexts separate. It's the same principle that forbids consecutive / parallel perfect intervals in polyphonic textures