Jack hadn’t bothered to try any Zacuity herself—she didn’t need drugs to make her job exciting. The engineer who’d provided the sample described its effects in almost religious terms. You slipped the drug under your tongue, and work started to feel good. It didn’t just boost your concentration. It made you enjoy work. You couldn’t wait to get back to the keyboard, the breadboard, the gesture table, the lab, the fabber. After taking Zacuity, work gave you a kind of visceral satisfaction that nothing else could.