The Agatha Nominees have been announced; see them all on Sarah Weinman's blog.
Here are the Children's/ YA (bummer they lump them together; how are you supposed to judge a children's book against a YA?)nominees:
Best Children's/Young Adult:
The Morgue and Me by John C. Ford (Viking Juvenile)
The Hanging Hill by Chris Grabenstein (Random House)
The Case of the Poisoned Pig by Lewis B. Montgomery (Kane Press)
The Other Side of Blue by Valerie O. Patterson (Clarion Books)
The Case of the Cryptic Crinoline by Nancy Springer (Philomel)