Good, think he will be worth your while. He gathered many paths to many treasure troves into his writings.
The story Ive heard is that his mother called him the Beast when he was small.
You could somewhat compare his stance on the Beast with Blake’s stance on Satan, though obviously they’re both too complex to take that very far. Both authors I mean.
Whatever else, Crowley stands at the threshold of a vast ancient world which comes to us mainly through him and the people around him - English aristocrats that spent their fortunes on gathering ancient magical knowledge at the beginning of the 20th century. Much was gained. For true understanding of his background, look into the Order of the Golden Dawn. The works of Israel Regardie are excellent. There is also a work by Regardie on his time spent with Crowley which Ive yet to read.
In any case I very much doubt there will ever be anyone who understands the Shadow aspect better than Crowley did - serving as it does in his work always the purpose of attaining the immaculate light.