Anything Ed Thigpen , Clayton Cameron, and Jeff Hamilton a great start. I love brushes, except I can only get hats to sound decent- the ride not so much with da brushes. Play rudiments with brushes and switch lead hands.
I always want at least one hand swishing-either back and forth or circles is up to you. I do both with the Ed Thigpen thing where one hand is swishing circles and the other is twitching back and forth like a rattle snake tail as fast as you can go-it's always easier to circle with my left and rattles snake twitch with right but I keep switching sides to build my ambidexterity. Most often I'm swishing right circles or twitches, and left pop accents or swishes along in circles or twitches. Don't fizzle on the sizzle. I play matched-though I experimented a lot with traditional.