Again, I might have a different view for series. To me, a series as at least four books in it.
Gallagher Girls: I'm a sucker for spy books and love the idea of an all girl spy school
Canterwood Crest: I went through the horse faze and these books bring it back. There's horse riding, friendship drama, and boys. I devour these books - luckily they come out every two months.
Blue Bloods: Awesome vampire series. I love the historical elements and the twist to their new lives this cycle.
Alchemyst: An action packed read full of danger. I love how mythology and history is woven together.
Alex Rider: Another spy novel series - the first that hooked me on teen spy novels. I loved the gadgets. I love how just when Alex thinks he's getting out of the spy world, they suck him back in.
Sure Fire: Two twins discover their father is actually a spy and come to his rescue several times.
Clique: Five girls trying to be friends while maintaining their independence.
Secrets of My Hollywood Life: I absolutely adore this series. I hate to see it end in January.
Artemis Fowl: I didn't love the last book, but I love the characters. I love Artemis and his evil way and snarky comments. I love Holly and her team.
S.A.S.S.: While this isn't a normal series - with the same cast of characters, it works. I love reading about the girls' adventure in amazing cities around the globe.