I know there have been comic adaptations of these books in manga style, and they look SO COOL.
The artstyle has this 2000s emo vibe that feels absolutely nostalgic. Apparently the artists change each volume, being the first volumes (Blood Relatives) being drawn by Priscilla Hamby (Rem/Tsulala, one of my favourite artists EVER) and the Graveyard Games with art by the spanish duo known as Xian-Nu Studio (which, you guessed it, are also in my list of favourite manga artists)