Vampires, can you recommend a similar book? It's similar to a novel about a boy who was captured by a vampire count and turned into a vampire. Do you have any recommendations?

I recommend " The Vampire Forced to Transmigrate ". This light novel tells the story of a person who was hit in the head by a falling ceiling and then transmigrated to the world of vampires. He was locked in a cave by the vampire count and drank the count's blood for no reason, eventually becoming a vampire. I hope you will like this novel.