"The case of the Haunted Sarcophagus"
Papa Axel and Cheezo run a detective agency called "Spookchasers". They investigate 'paranormal mysteries' . . . at very reasonable prices ! They travel by penny farthing ( it's kind of an old style bike ! ) and carry a spookbag containing expensive spook hunting gear. In this weird tale, the duo are asked , by a very famous archaeologist, to find a demon that's terrorising his castle.
They have to find where the demon is hiding and contain him ! Hmmmm not easy !!??
Spookchasers - The Haunted Sarcophogus
This is a graphic novel, and Spookchasers books are aimed primarily at the 7 - 11 year old reader.