The Gem Lords

Thomas Gown's connection to a group of powerful wizards who lived thousands of years ago is finally revealed, and he learns that he may be able to save his world and his civilisation, along with others beyond number, from a threat that will manifest itself in the far distant future, but that the only way he can do this is by accepting a destiny that has been chosen for him by ancient, implacable powers centuries ago. If he does this, though, it would mean sacrificing any hope for a normal life and leaving his home, his wife and his child forever...