We’re drowning in Gatsby adaptations, but it’s hard to match the splendor of Elevator Repair Service’s Gatz. Returning for an encore at the Public Theater this fall, the company’s six-hour-long rendering of every word of Fitzgerald’s book was its first adaptation of a novel, a theatrical mode now almost synonymous with their name. It’s also a marvel, an exponential curve of enchantment that coalesces patiently, even anti-dramatically, until suddenly...