Overlord Bonus Volume

The Vampire Princess of the Lost Country (亡国の吸血姫) is a bonus novel by Kugane Maruyama in the Overlord series. It was released on April 27, 2019.

Trivia

 * In order to acquire the bonus novel, it is necessary to buy all three Overlord III Blu-ray bundles. Contained in Box 1 and Box 2 are tickets showing proof of purchase and subsequent orders to buy the next Box. The last Box 3 contains an application to order the novel costing 1500 yen.
 * Originally the novel was supposed to be released in March 2019, however it was delayed a month later.