The Day Is Ours(2011)
(Book 1.5 in the Dragon Brigade series)
A Novella by Robert Krammes and Margaret Weis
When the magically reinforced flying fortress refuses to surrender after many days of shelling, the Rosian Royal Navy calls in the famed Dragon Brigade to help defeat the stubborn enemy. Lord Captain Stephano de Guichen and his dragon, Lady Cam, brace themselves to face enemy fire, but soon discover that court intrigue is dangerous than cannon balls.
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Used availability for Robert Krammes's The Day Is Ours
May 2011 : USA, Australia, Canada, UK Kindle edition