Where’s Wally style picture book series about a family of Vampires

[Angus]

I remember there being multiple books in this series I had a few of when I was younger.
I remember there was a family of the vampires, don’t remember how many of them,
They did get delivered Blood in Bottles by a Milkman who wore a metal guard around his neck for protection,
Sometimes they’d play sports like tennis/racket all using a heart as the ball,
There was a lot of complexity and detail to the pages where you could keep finding details.

[Deniseey]

Hi this is a long shot but could it be a book from this series? Pierre the Maze Detective: The Search for the Stolen Maze Stone