Reddit mentions of The Lesser Key of Solomon

http://www.amazon.com/Lesser-Key-Solomon-Joseph-Peterson/dp/157863220X

and basically anything listed in the 'also bought'

You could try summoning Orobas, and asking him. He's supposed to be relatively friendly and doesn't usually lie to the mage and doesn't try to fuck you over. He is #55 in the Lesser Key (The Crowley, Mathers, Conybear one). His shit says "The Fifty-fifth Spirit is Orobas. He is a great and Mighty Prince, appearing at first like a horse; but after the command of the Exorcist he putteth on the Image of a Man. His Office is to discover all things Past, Present, and to Come; also to give Dignities, and Prelacies, and the Favor of Friends and of Foes. He giveth True Answers of Divinity, and of the Creation of the World. He is very faithful unto the Exorcist, and will not suffer him to be tempted of any Spirit..."

I think he is usually one of the first entities people summon for this reason. I know, like, Lon Milo DuQuette summoned him for help and he helped him get out of some dire financial straights. So if you're up for working with demons again I suggest giving him a shot.

I think this is supposed to be the better version of the Lesser Key https://www.amazon.com/gp/product/157863220X/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1

That's all I can think of at this moment, hope it is helpful.

Joseph H. Peterson is THE man when it comes to grimoire translations. His annotations are scholarly and top notch. I can't recommend him enough.

https://www.amazon.com/Lesser-Key-Solomon-Joseph-Peterson/dp/157863220X/ref=asap_bc?ie=UTF8

http://www.amazon.com/Lesser-Key-Solomon-Joseph-Peterson/dp/157863220X <- buy this, you will be equipped to read the other books on the goetia once you have read it.

Ma a lui chi l'ha insegnato il Voodoo? Ah, no, c'è WikiHow "usare una bambola voodoo in 6 passi".

Pensa se avesse scoperto questo

Oooooh, I'm actually not all that familiar with Early Modern Germany, but I think I've found a few books that may help you with the religious, political and military aspects. Some of these books are pretty expensive, so I'd recommend finding a good library or seeing if your local library does inter-library loans with larger libraries. Usually you have to read the books pretty quick, but it saves paying $150 for a book if you're not in a position to do that. Just be sure to take plenty of notes!

I'd also be willing to look at what you've got but, like I said, I may not be as useful as I first thought.

The Reformation: A History

The Thirty Years War: Europe's Tragedy

The Rise of Modern Warfare: 1618-1815

The Witch-Hunt in Early Modern Europe

The Witchcraft Sourcebook

Germany and the Holy Roman Empire: Volume I

Society and Economy in Germany, 1300-1600

Flesh and Spirit: Private Life in Early Modern Germany

Panaceia's Daughters: Noblewomen as Healers in Early Modern Germany

Ecology, Economy and State Formation in Early Modern Germany

Crime and Culture in Early Modern Germany

The Martial Ethic in Early Modern Germany: Civic Duty and the Right of Arms

He Is the Sun, She Is the Moon: Women in Early Modern Germany

The Realities of Witchcraft and Popular Magic in Early Modern Europe: Culture, Cognition and Everyday Life

The Lesser Key of Solomon

The Art of Combat: A German Martial Arts Treatise of 1570

You want this version of the Lesser Key. Actual grimoires are usually an interesting mess of bad writing and poorly copied latin or greek. While interesting, they're usually a source of adventure in reading let alone use.

Going by OP's description The Book of Oberon sunds like it has some similar content - or at least similar aims.

Grimorim Verum is a pretty famous 'black magic' book.

The Lesser Key of Solomon is probably the most well known.

I'd expect there would be some parallels to thing in Agrippa as well.