Looks like a really cool challenge!
Not sure what is meant by 'saga' to be honest, but Twilight is called saga, but I don't know if you're into vampire romance .. things..
I looked up Half Bad. Did you like that? Because there are a lot of YA fantasy books available. Maybe something like Poison Study by Maria V. Snyder? It is a series and Im not sure how many books there are.
The Hobbit is about adventure..right?
Also looked up Mash-ups, and I found a lot of vampires, zombies and werewolves haha Maybe Cinder by Marissa Meyer? It's a series based on fairy tales, but takes place in a futuristic world and contains cyborgs and stuff. Every book is based on another fairy tale. (series is called The Lunar Chronicles) .... I actually think Im going to read this.
Oh! This is actually really hard, because with every genre I'm like; What kind of (paranormal/adventure/classics etc) do you like?
Im sorry if this didn't help you..
Curious about other replies and recommendations :3
Good luck!