The brush course is a collection of the best lessons I've found by drummers who are way better at it than I am. Check them out and let me know what you think. I will be adding my 2 cents later. All of these players are masters at brush playing. Also included is an out of print book by the late great Philly Joe Jones.
140 learners taking this course
This is a masterful lesson on brushes and quite possibly the only one you'll need.
Great lessons and concepts from a master teacher
His now out of print instructional video featuring Ron Carter. Classic brush patterns.