Here are some underrated YA book series you need to check out!

I have read:

18: Legend series by Marie Lu
21: Wicked years by Gregory Maguire
25: Lux series by Jennifer L. Armentrout
26. Shatter Me series by Tareheh Mafi
27: Uglies series by Scott Westerfeld
29: The Infernal Devices by Cassandra Clare

Those were really good series, I'm not sure about the rest on the list, highly doubt I will read them.

http://www.buzzfeed.com/sarahgalo/underrated-book-series-that-need-more-love?bffb&utm_term=4ldqpgr#.ixd2DAMXnD