Fever Crumb by Philip Reeve

This was another REALLY good book. This was really thought-provoking. It takes place sometime in the future, where the only memories of our civilization are those left by artifacts. In London, Fever Crumb is an Engineer. She is the only girl with such a prestigious position. Engineers believe in always being rational, surpressing emotion, and hair is unnecessary. She is happily living in Godshawk's head with Mr. Crumb and the rest of the Enginners, until one day, a man requests her specifically for a job, which changes everything she ever knew about herself, history, and the universe. This book is Post-apocalyptic steampunk done right. Highly recommend it.