The Hunted by Charlie Higson is book six of The Enemy Series. Try to imagine a world that is so bad that the lucky ones were the ones who died. A sickness swept through the country and killed all those over fourteen. The children who are left are being hunted and there is no place to hide.
The Inventor's Secret by Andrea Cremer created a steampunk, alternative history. The story is set sometime after the Revolutionary War and the loss by the Rebels to Britain. The Conjurer's Riddle continues the story of a struggle for freedom from tyranny.
Lion Heart is the third in the Scarlet series by A.C. Gaughen. This is a fun story of hidden identity, and the fight for justice. If you enjoy Robin Hood, this is a familiar tale with a big twist as Robin's friend, Will Scarlet, is a girl who is being hunted and haunted by her past.
One more series that is at book six and still going is The Fate of Ten by Pittacus Lore. This is a part of the I Am Number Four series. Aliens are living on earth and being hunted by another alien race that wants to end their existence. There are only a numbered few that must come together to defeat their enemy.
Well, there are so many good books to choose from. I hope you find a story that draws you in and has you wanting more.