Some of the less developed works are exquisite in their early stages, such as the illustration of virgil, at the request of beatrice. In another watercolor, dante and virgil approach the minotaur.
An image of the lustful dead being swept across the dark indigo night sky is a fantastic image. The finished work of neptune's son anteus is absolutely beautiful. For the most part, the works are magnificent.
Purtroppo il mio voto è assolutamente negativo. The others seem sketches or proofs, or incomplete works.
A dictionary of alchemical imagery takes a hard-to-grasp, weird world and simplifies alchemy in friendlier and even fun terms. Probably the best book on alchemy out there.