The Silver Catacombs (Elfblood Trilogy #2)

Charlie arrives in Kiloreen, the elven homeland, where he discovers the Elven Resistance Movement working secretly to reclaim their city and fight against King Richard. The elves are willing to join forces with humans in this struggle, but the critical challenge remains: locating the lost magic that could turn the tide of the war. The story centers on Charlie’s quest to find this hidden power, which is vital to the outcome of their fight for freedom.