Chronicles of Marsh by Jemima Pett
The Princelings of the East are now King Fred and Prince Engineer George. Gone are the years of innocence when they travelled for adventure and uncovered time tunnels and pirate plots.
Now Fred, assisted by his queen, Kira, has the responsibility for his people, his lands, and for persuading the lords and kings of the Realms to act together for the common good.
George just has to work on his inventions, always thinking of a final goal: to fulfil the promises made to Lord Mariusz so long ago.
Neither has an easy task.
Fred decides to write this history of his reign. He starts with the joy of his inheritance, but quickly shows us that developments in the Realms are not leading towards a settled and happy future.