HBR's 10 must reads series. HBR's 10 must reads (Series) HBR's 10 must reads on strategy HBR's 10 must reads on leadership HBR's 10 must reads: the essentials HBR's 10 must reads on strategic marketing. HBR's 10 must reads on managing yourself HBR's 10 must reads on change management HBR's ten must reads on strategic marketing.