I don't know how compatible they are with GD magic, but a few options for Shadow work:
1) Owning Your Own Shadow by Robert A. Johnson - this is pretty brief and straightforward and includes some exercises for figuring out what you have pushed into your Shadow and how to come to terms with it.
2) King, Warrior, Magician, Lover by Robert Moore - This is mostly useful if you are a man, but it describes the four archetypes in the title, and relevant for Shadow work, what they look like when they are expressed as part of your Shadow rather than healthily (Tyrant, Sadist/Masochist, Manipulator, and the Addicted)
3) The Shadow and Evil in Fairy Tales Marie-Louise von Franz - I haven't actually read this one, just skimmed it, but von Franz was a student of Jung's who did a lot of work on exploring archetypes (including the Shadow) in folklore. Might be helpful.
4) Jordan Peterson (either various videos/podcasts or chapter 6 of 12 Rules for Life) - Peterson is very big on integrating your Shadow, which is unsurprising since he's heavily influenced by Jung. Rule 6 of his book "Set Your House in Perfect Order before You Criticize the World" is an examination of the role of resentment and bitterness in our psyches. His advice is to pay attention to where you are resentful or bitter (or where you fantasize resentfully or bitterly) and realize that that is likely a pointer to parts of your Shadow and explore from there. He also recommends noticing what people/things in the world anger or disgust you, as it is very likely you are projecting some of your shadow on them if you have that reaction.
Re: Shadow Work
1) Owning Your Own Shadow by Robert A. Johnson - this is pretty brief and straightforward and includes some exercises for figuring out what you have pushed into your Shadow and how to come to terms with it.
2) King, Warrior, Magician, Lover by Robert Moore - This is mostly useful if you are a man, but it describes the four archetypes in the title, and relevant for Shadow work, what they look like when they are expressed as part of your Shadow rather than healthily (Tyrant, Sadist/Masochist, Manipulator, and the Addicted)
3) The Shadow and Evil in Fairy Tales Marie-Louise von Franz - I haven't actually read this one, just skimmed it, but von Franz was a student of Jung's who did a lot of work on exploring archetypes (including the Shadow) in folklore. Might be helpful.
4) Jordan Peterson (either various videos/podcasts or chapter 6 of 12 Rules for Life) - Peterson is very big on integrating your Shadow, which is unsurprising since he's heavily influenced by Jung. Rule 6 of his book "Set Your House in Perfect Order before You Criticize the World" is an examination of the role of resentment and bitterness in our psyches. His advice is to pay attention to where you are resentful or bitter (or where you fantasize resentfully or bitterly) and realize that that is likely a pointer to parts of your Shadow and explore from there. He also recommends noticing what people/things in the world anger or disgust you, as it is very likely you are projecting some of your shadow on them if you have that reaction.
Hope some of these help, and good luck!
Jeff