This is the "lost" Alex Balfour novel. Read the introduction to learn why the book was never published. In it, Alex arrives in England in 1913 and is trying to establish a life when he finds himself walking up the gangplank of HMS Titanic. There's only one reason he would board the doomed ship, and that is to save his love, Molly. If he can, he will also save himself.
Used availability for Allen Appel's Sea of Time
November 2012 : USA, Canada, UK Kindle edition