The Bayerische Staatsbibliothek (Bavarian State Library) has digitized, and made available online, the Artilleriebuch by Walther Litzelmann, originally published in 1582.
Details of some of the diagrams are also available on Bibliodyssey which also offers this description:
It is a ~500 page paper manuscript from 1582 filled with sketches of bombs, cannons and fireworks, for the most part. The elaborate titlepage advises (thanks NINA!) that Litzelmann belonged to the Bavarian Armoury or Arsenal at Ingolstadt and that the secrets of saltpetre and gunpowder production would be revealed within.