I recently finished the Midnighters series and the Uglies/Pretties series. I read the series back to back and both were awesome! Matt has read his Levianthan series and liked that one.
Midnighters is about five teens that are awake during a secret hour that happens at midnight. Monsters also exist during that one hour out of 25. It is action/horror/mystery. There are 4 books in the series.
Uglies is a futuristic story where at the age of 16 you go under the knife and become "pretty". It's conspiratorial and keeps you guessing to the end. There are 3 books in the series but he just came out with a 4th that is about a different character, I haven't read the latest one yet.
There have also been several picture books that Natalie and I have both enjoyed. Here's one of them.
The Black Book of Colors
At night we read Shel Silverstein which she loves. We've read Falling Up, A Light in the Attic, Runny Babbit, Lafcadio. Next of the list is Where the Sidewalk Ends. Not long after we started reading his books she started to ask me if different words rhymed. Also if I am talking and happen to rhyme on accident she immediately notices and says, 'this word and that word rhyme'.