The Task of the Three Graves. The Investigations of Di, the Vampire Judge

Medieval Europe. A world of darkness. A kingdom of plague. Gothic castles, secluded monasteries, monks and knights, and creatures that appear only at night. A world where vampires can roam freely… at least as long as they follow the rules! For a vampire is forbidden to kill another vampire. Well… unless he has a really good reason.
Meet Judge Di. Ancient. Immortal. Ascetic. His cold mind attracts any mystery, wherever it arises, and he will stop at nothing to unravel it.
Jonathan, the mortal assistant to the judge, on the other hand, mostly just wants a piece of cheese. With bread, if possible. And perhaps some pickles as well. After all, it’s not easy to live side by side with bloodthirsty vampires who see you more as a snack than a full-fledged assistant…
The call of adventure leads this extraordinary pair from the warm valleys of Italy to the peaks of the French Alps, and then to misty London. They will have to face damn difficult challenges, not least of which will be the riddle of love.