Seven unlikely adventurers. One mysterious, crystal Rainbow Tower. Danger, magic, and more than a few sarcastic remarks await as Sapphyra, Darin, Garret, Sister Susan, Mikka, Gillette, and Karvath face challenges that test their courage, wits, and friendship. The Rainbow Tower is the first book in The Gemstone Wars series-a humorous, action-packed fantasy adventure where every stone holds a secret, and every hero has a voice.