Voltron: Legendary Defender #1

The Galra have long held a number of slave planets in their grasp, and the Paladins have devised a plan to free them. To do this, Allura must first find a way to infiltrate SPRAWL, a group of closely guarded planets that are mined for many of the Galra's construction materials. Cutting off these resources is the first step toward bringing down the Galra. But the key to successfully finding a way in is to break the bond of the mysterious force that holds these planets together.