The Ring of Kékkő Castle

In the tumultuous year of 1634, Bálint Felföldi starts a quest to find the lost Ring of King Matthias Corvinus in the wild lands of the Hungarian Borderlands where the remnants of the once great Hungarian kingdom mix with the Habsburg and Ottoman Empires. 
At the center of this tale of adventure and intrigue is Bálint, the son of a Hungarian mother of the Székely frontier guards of the Carpathian Mountains and Scottish soldier-of-fortune who came to Hungary to serve the Prince of Transylvania.
On his quest, he has adventures and overcoming obstacles, hardships, and foes that seek to undermine his efforts. 
The novel wishes to pay tribute to the Hussar and Hajdú warriors of the Hungarian Valiant Order of the Borderland who had been gloriously blocking the Ottoman Empire's expansion into Europe for centuries.