(Warning: This description—and the story itself—contain spoilers from Hugh Howey's Wool Omnibus.) What happens when a silo goes dark—willingly? Maya has been sent to Silo 23 to investigate. Disconnected from the grid, the silo appears to be dead, rotted from the inside. What Maya finds is a silo that is anything but deceased. Shut off from the outside world and other silos, Silo 23 has evolved into something unexpected, and something more fearsome than Maya could have anticipated. Greatfall: Part 1 is the first installment of Jason Gurley's dark serial novel, inspired by the world created by Hugh Howey in Wool.

Greatfall: A Silo Story (Part 2) is the second installment of a dark new story set in the world of Wool, Hugh Howey's post-apocalyptic vision of humanity and its struggle to survive. (Warning: This description—and the story itself—contain spoilers from Hugh Howey's Wool Omnibus.) The dark nature of Silo 23 continues to reveal itself to Maya, who lies bleeding and starving in a cell on the uppermost floor, and to Isaac, the innocent boy selected to carry on the silo's terrible legacy.

Greatfall: A Silo Story (Part 3) is the final installment of a dark new story set in the world of Wool, Hugh Howey's post-apocalyptic vision of humanity and its struggle to survive. In Part 3, the longest installment of the series, Silo 23 is darker than ever before. While Maya and Esther flee into the down deep, Matthew subjects Isaac to the sort of rigorous conditioning that robs the boy of his soul. Daniel wrestles with his new identity, tormented by what he has learned. And the believers, just pawns in a centuries-long game, begin to learn the truth... In this pounding conclusion to Greatfall, thousands of people confront their nightmares. Not all of them will survive, but those who do will have one hell of a story.