One of the first Young Adult series that read and couldn't wait for the next book, was The Hunger Games by Suzanne Collins. I was fairly new to reading YA literature and I loved the story, the action, and the characters. I'm sure that most of you already know the story. Katniss Everdeen takes on the capital and leads a revolution. If you haven't read it, I highly recommend it.
Another series that I'm reading and still waiting for book three is The Wrath and the Dawn by Renee Ahdieh. This series follows the choice of a young girl to volunteer herself to marry the Caliph to prevent the death of any other young women. The Caliph marries and the bride dies, but not this time. There is so much depth to this story as we get to know the characters and their motivations. Again, I highly recommend this series.
The series that I am finishing right now. I am reading book three of The Kiss of Deception by Mary Pearson. I have read other series by this author and I have not been disappointed. This story follows a princess who runs away from an arranged marriage and finds herself later falling in love with the very man she was to marry. But, are their paths meant to pull together, or do they have separate paths to take? Are the words of an old prophecy true and being fulfilled? This series reads fast and again, comes highly recommended.
I love reading series, and I hope you can find one you enjoy too.