The saga of _Halo Wars_ enters the modern age as _Infinity_ struggles to liberate the long-lost _Spirit of Fire_ from the deadly Vata 'Gajat. Meanwhile, Petra's search for the identity of _Infinity_'s spy could result in her death. The _Halo_ universe is on the brink of a new galactic war! * From Christopher Schlerf, lead writer of _Halo 4_! * An essential addition to the _Halo_ canon! * The Halo franchise has sales eclipsing $3 billion over its lifetime!