Ronia the Robber's Daughter - Astrid Lindgren. It's a great book for this age... I think I was 13 when I read it. Hope you like the book! :)
The Chronicles of Narnia - C. S. Lewis is a good choice if you like fantasy.
The fallen series by Lauren Kate
The hush hush series by Becca Fitzpatrick
The Shiver series by Maggie Stiefvater
The twilight saga by Stephenie Meyer
The skulduggery pleasant series by Derek Landy
all good series' I love them they are all great reads!
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The Wednesday tales series
Harry potter series
The hunger games series
The Percy Jackson series
The heroes of Olympus series
The twilight saga
The pretty little liars series
The warriors series
haddix found series
the seekers series
The may bird series
A corner of the universe
the lemonade wars
city of ember
The Chronicles Of Vladimir Tod- Heather Brewer
The Slayer Chronicles- Heather Brewer
Soulbound- Heather Brewer
Beastly- Alex Flinn
Bewitching- Alex Flinn
A Kiss In Time- Alex Flinn
Cloaked- Alex Flinn
Sucks To Be Me- Kimberly Pauley
Still Suck To Be Me- Kimberly Pauley
Blue Is For Nightmares series- (unknown author)
Ooh!! I know what you should read!! You should read The Fire Within. I just got done finishing it and I loved it!! The Fire Within is the first book in The Fire Within series. It's really good.
-Percy Jackson Series by Rick Riordan (Fantasy/adventure)
-The Secret Series by Pseudonyous Bosch (Mystery)
-Series of Unfortunate Events by Lemony Snicket (Mystery)
-Warhorse by Michael Morpurgo (Adventure)
-Artemis Fowl by Eoin Colfer (Fantasy)
-Airman by Eoin Colfer (Adventure)
-Skulduggary Pleasant by Derek Landy