The High Road — Daniel Kirk

In The High Road, Matt and his sister Becky must work with the elves and Tomtar the troll to save the Cord and the human and elf worlds. After forming an uneasy alliance, Matt, the elf Tuava-Li, and Tomtar start on a quest to restore the tree whose roots make up the Cord at the northern pole, in order to bring well-being to all the realms.

Meanwhile, Becky accompanies Asra to free Becky's parents, held captive in the elfin kingdom of Helfratheim. To their horror, both groups discover that Brahja-Chi has begun kidnapping human children for a mass sacrifice to appease the goddess. In addition to their tasks, they must also stop the fiendish Brahja-Chi and her accomplice, Jardaine, from continuing this atrocity.
 
Daniel Kirk's trademark illustrations -- including maps, character portraits, and other scenes -- bring to life the riveting and engaging story.