The Tree of Life: Enoch's Children Book 7

The aliens, the Nimobes, have settled into their city many miles south of Jasper on the open land north of the Grand Canyon. They watch the people in Jasper, and have developed a relationship with them through the doctor that was supposed to spearhead the invasion, but protected the town instead. But hidden in the upper eschelons of their leadership, the war with Earth is about to take a dramatic resurgence, and Mordechai, the Nimobe doctor, is the only one who can stop it.
The deadly spiders that the Nimobes waged a constant battle with back on their homeworld, stowed away on their ships and arrived in their new city with an agenda of their own.
Cory, Thomas and Virgil visit the great tree, revered by Virgil's people and hidden deep in the caverns he lived in for most of his young life, to see if they can save it. Since the caverns were opened the tree has been slowly dying. They have to recover from the strange oath they've been put under, and return to normal life. But can they do it, or will them remain forever under the control of Wilks and his followers?