This is the first novel from Jack Hight and is based on the siege of Constantinople in 1453.
The book weaves the story of Sultan Mehmed, Longo the Genoese commander of the city's defences and some love interest with the Princess Sofia. The author keeps fairly close to the historical events whilst developing the characters in the best traditions of historical fiction.
He also adds to the history a range of plots and conspiracies that make the story much more than a retelling of the famous siege, epic though that was in its own right.
This is a great read and I look forward to more by this author. His current project is a trilogy about Saladin.