It’s not 40k! It’s a physics professor who gets turned into a vampire, learns magic, and get isekai’d. Every book is a hard left turn from the one before, so I can’t tell you a ton about them without major spoilers, but they’re really really great. Specifically topical is magicians are different from wizards. Magicians learn spells by rote and are like phd engineers, they might only make one new spell every few years but it’s gonna be damn efficient and effective. Wizards are the magical garage tinkerers, rarely learning spells academically like magicians do but cobbling together what they need on the fly. It’s a fascinating setting because it is sort of magically learning stagnant, with the people capable of the highest feats of magic incredibly specialized in a domain not develping much new, while the innovators are the ones who are weaker and more downtrodden. I cannot recommend it enough.