Something Rotten by Jasper Fforde on is the fourth book in the Thursday Next series. If you haven't already read The Eyre Affair, Lost in a Good Book and The Well of Lost Plots, don't even attempt to start with this one.
In Something Rotten, Thursday Next returns to the real world (well, as reall as it gets in these books) with her son and Hamlet in tow. She learns that bad guy Yorrick Kaine has joined forces with the omnipresent Goliath Corporation to oust the aging English President. As Prime Minister, Kaine wields has used his mysterious influence to pass bizarre laws and stir up hatred of Denmark. Thursday gets her job back at SpecOps to try to defeat Kaine, get her husband Landen back, and try to prevent the end of the world.
It's all very complicated, as I think all the Thursday Next books seem to be, but this one did feel a little more rushed than the first two. But I liked this one more than The Well of Lost Plots (#3).
Buy Something Rotten (a Thursday Next Novel) by Jasper Fforde on Amazon.