The Nigromantisches Kunst-Buch is one of the most substantial German grimoires on demon magic. It appears here for the first time in English translation, complete with introduction and commentary. The work, which translates as "Book of Nigromantic Arts", has a mysterious history. It likely dates from the 17th century but has much older roots, as it contains various sigils with a Faustian feel. We know that before its 1743 republication by the "heirs of Peter Hammer", the Nigromantisches Kunst-Buch was part of the monastery collection of Prince-Abbot Rupert II (Rupert von Bodman). He was a remarkable historical figure from a Swabian noble family, who played an active role in saving women accused of witchcraft. Rupert II was confirmed by Emperor Leopold as the Archmarshal of the Empress and had a role in European history as a co-founder of the Principality of Liechtenstein. How and where he obtained the Nigromantisches Kunst-Buch remains unclear. This translation contains more than 80 original illustrations, mostly of magical circles and demon sigils, complete with their task descriptions. Unique are the sigils of the great infernal princes such as Astaroth, Be(e)lzebub, Belial(is), Oriens, Suria, and others. Additionally, this work includes Goetia-like listings of other, mostly unknown demons, such as Basclip, Walachy, Mirus, Gaimon, Buchermann, etc. This is alongside various other magical instructions, such as those for creating enchantments, magical circles, and the wand, as well as astro-magical information. "About the Wand of Fortune, the Ring, and the Crown of Solomon, the Princes' Secrets, the Servile Crystal and Treasure Spirits, and other wonderful Arcana."