Okrent's new book, "Chicago From the Sky: A Region Transformed," is full of these comparison aerial photographs. Blair Kamin says the book often reads "as a paean to Chicago's unquenchable appetite for change."
Kamin says that Okrent does not take a position one way or another on whether the growth was good or bad for the city:
"Readers must draw their own conclusions, though the sharp-eyed will surely be able to discern key trends, among them how Daley's love for planting trees has softened once-mean streets."
A photo gallery can be seen over at The Chicago Tribune.