Rogue One : a Star Wars story / Alexander Freed.

Enhanced descriptions from Syndetics:

NEW YORK TIMES BESTSELLER * Go beyond the film with a novelization featuring new scenes and expanded material.

As the shadows of the Empire loom ever larger across the galaxy, so do deeply troubling rumors. The Rebellion has learned of a sinister Imperial plot to bring entire worlds to their knees. Deep in Empire-dominated space, a machine of unimaginable destructive power is nearing completion. A weapon too terrifying to contemplate . . . and a threat that may be too great to overcome.

If the worlds at the Empire's mercy stand any chance, it lies with an unlikely band of allies: Jyn Erso, a resourceful young woman seeking vengeance; Cassian Andor, a war-weary rebel commander; Bodhi Rook, a defector from the Empire's military; Chirrut Îmwe, a blind holy man and his crack-shot companion, Baze Malbus; and K-2SO, a deadly Imperial droid turned against its former masters. In their hands rests the new hope that could turn the tide toward a crucial Rebellion victory--if only they can capture the plans to the Empire's new weapon.

But even as they race toward their dangerous goal, the specter of their ultimate enemy--a monstrous world unto itself--darkens the skies. Waiting to herald the Empire's brutal reign with a burst of annihilation worthy of its dreaded name: Death Star.

Praise for Rogue One: A Star Wars Story

"One of the best movie adaptations yet." -- Cinelinx

" Rogue One bridged characters and elements of the prequels and original Star Wars trilogy in a visually stunning ride, but there are even more rich details hiding in the film's novelization, [which] reveals and expands with inner monologues and character insights, political knots, and nuance." --The Daily Dot

" Rogue One: A Star Wars Story novelization deepens a tale of hope. . . . [Jyn Erso] proves to be even more fascinating here than she was in the movie." --New York Daily News