The rhyming half of long-standing Oakland duo Zion I, Zumbi (a.k.a. Zion) is well established as one of the Bay's strongest lyricists. With his producer partner Amp Live, he's dropped numerous albums and singles going back to the turn of the millennium, showcasing his impressive wordplay and high-pitched, instantly recognizable vocal tone. On this, the fourth installment of his ongoing Science of Breath series, he continues to show and prove, with 16 tracks that highlight his thought-provoking verse-work while also giving shine to talented collaborators like Houston producer The Are (keep an eye out for their new project The Burnerz), Talib Kweli, K'Naan, Mistah FAB, Lee Bannon, J Period, and more. More like a mixtape than a proper album, it's got something for everyone; check the ATCQ-throwback "Vibes N Stuff," the rowdy "Warrior Class," and "Warwalk" featuring the Mighty Underdogs and Chali 2Na.