Middlemarch is a recognized masterpiece that explores the complex social world of 19th century England. It is concerned with the lives of several ordinary people, albeit ones with high social standing. The novel explores the very fabric of Victorian society in the 1800s, showing how various human passions--heroism, egotism, love, and lust--interrelate within this society.
The Mysterious Benedict Society: One of the most amazing series I have ever read. The plot involves four gifted children who go undercover in a school run by the villain. Sounds slightly cheesy, but it's really quite intriguing.