Omphalos

After destroying the Chintamani, Alex Scire flees Scotland, planning to go to the dragon world of Berellus with his friend Chrysophylax. Only his mysterious ankh has different ideas and diverts them to Greece - and into the midst of Atlantians who want Alex dead even more than the Druids do.

To survive, and achieve his goal of destroying the rest of the magical Maqlû, he'll have to survive volcanoes, terrifying monsters, and the most byzantine labyrinth ever built. But this time, he won't have Jane and Diana to help him out of every scrape he gets into, since the Druids are using the girls to trap Alex.