Great YA book

I just finished reading Veronica Roth's Divergent and Insurgent. At first, the novels reminded me of Hunger Games. But I got so engaged in the story and the characters that I forgot all about the similarities. Tris and Four were amazing characters. The ancillary characters were equally as dynamic. The concept of factions based on attributes was very compelling. I loved the fact that there were people like Tris who broke these molds. I can't wait to read the third book. Does anyone have any recommendations for my next read?