The vernal memory
(Book)

"Everlasting is on the brink of total war. As the terrorist organization known as Garden attempts to assassinate key members of the Leadership, another unseen hand has plans of its own. Back at the human outpost, Mei Curie and her team are working to create the ultimate cure for the Variant gas. But with the war raging deep within the city, the shield could collapse at any moment, killing millions. Time is of the essence. Meanwhile, Terry waits beneath Everlasting, having been rescued by Garden's forces. In an effort to repay this debt, he agrees to assist them in a dangerous task. With Lena Sol at his side, Terry sets out across the sea to a foreign land, seeking a prize that may very well end this conflict once and for all"--Publisher's description.