Legions & Liches. Portals, #6

The living are becoming the lost. The dead are building an army. And twelve liches have found a path to godhood. Reginald and Griffon have crossed worlds, died more than once, and survived magic that should never have been unleashed. Now the disease they helped release is spreading across Teurone, turning ordinary people into the lost folk-living bodies enslaved by the will of the dead. Their search for a cure leads toward Ez'rainia-fromton, a desert prison city ruled by liches.
Along the way, the Traveller's Inn opens a door for Lieutenant Reid I. Pierce, a military pilot and engineer torn from Earth and awakened in a stranger's body while insectile raiders burn the only home that body has ever known. Reid refuses to be anyone's pawn. Reginald won't abandon a story before he understands its ending. And Griffon still thinks every nightmare has rules-until the rules begin changing.
To stop the liches, the three must survive fallen cities, break the chains binding the vriktiri, and reach Rykul the Great Bear before the undead can turn an ancient force of nature into their god. But in a city where life, death, and loyalty can be rewritten, victory will demand more than magic or steel. It may demand a sacrifice that changes a hero forever. Legions & Liches brings the six-book Portals arc to a thrilling close with dangerous magic, strange humor, found family, and a final choice worth crossing worlds to make.