Thank you to the editors who have been involved with this trilogy during its long road to completion — Jo Fletcher, Simon Spanton and Gillian Redfearn in the UK, and Ginjer Buchanan, Lisa Rogers and Diana Gill in the United States, and the many good people at Orion, including (but not limited to!) Charlie Panayiotou, Marcus Gipps and Krystyna Kujawinska who have worked to bring my books into the world, and helped them find their audience, both here and abroad. Thanks also to my agent, the indefatigable Robert Kirby, for endless enthusiasm and support during the long six years that it took to write these books, and to the readers who have followed me from Earth to the waters of Poseidon.