I have the Golden Compass series on my TBR list for this year( I only read the first book when I was a kid) so I started thinking about the books I remember loving when I was younger, adolescent to high school mostly with some elementary thrown in. They're not necessarily in order of likeability.
but really young:
Elementary Age:
Adolescent:
Higschool
Adolescence/High School:
Looked up the skulduggery series, and it sounds like a pretty cool series. It's not a series I'm familiar with, I graduated high school in 2003 so when the series started I was a college student so I wasn't the age range it was meant for, but the idea of a skeleton detective sounds pretty cool.