Yotsuba&! Volume 1: 08/10/11
Yotsuba&! Volume 1 is by Kiyohiko Azuma, who also created Azumanga Daioh. A new family moves in next door, a father and his young and some what odd daughter, Yotsuba.
The first book the family moves in, has trouble with boxes and many different people get stuck in the bathroom because the lock doesn't always work. The only way out is through the small window.
Yotsuba has an unbridled enthusiasm for everything. Azuma captures the unsual ways children see things at a young age. It's made it a little more mysterious by giving Yotsuba a dubious back story. All we know so far is that she was found by her father somewhere "left of Japan."