Sure. 'Vampire Hunter D' by Hideyuki Kikuchi is a great start. It introduces the world of D, a half - vampire, half - human hunter. Another one could be 'Raiser of Gales' which continues the adventures and expands on the lore of the series.
I'm not entirely sure as I haven't read it in detail. But generally, it might be about a vampire hunter named D and a character named Leila. It could involve their adventures in a world full of vampires, perhaps battles against the undead, and their own personal stories and growth within that dangerous environment.
For some readers, it could be a bit challenging as it has a unique world - building with its own set of rules regarding vampires, dhampirs (half - vampires like D), and the post - apocalyptic setting. However, if you take your time to understand these elements as you read, it becomes easier. The story also has a lot of action and adventure, which can help keep you engaged even if you are a bit confused at times.
Since it's part of the 'Vampire Hunter D' series, volume 7 novel would likely follow D's ongoing battle against vampires. It could explore more of D's past or his unique abilities. There might be new challenges for D, like a powerful vampire lord that he has to defeat. The story could also introduce new elements to the world - building, such as different types of vampire powers or new regions that D travels to. And it might also show how D's actions affect the relationship between humans and vampires in that world.