The newest book in the Red Blazer Girls series was published recently! I love this series, the young girls are smart, witty and funny.
One of their stand- out covers (yet again!) next on my list is Professor Gargoyle. This is a new series from Quirk Books and it's engrossing and fun. The cover morphs from grumpy Professor to Evil Professor!
http://www.kinglillian.com/ an adventure that needs to be experienced by all, check out the audio preview at this website, the author is an amazing narrator.