Several professional organizations and local experts have published detailed "white paper" style guides that cover best practices for renting in the Chicago market.
: This paper-style blog post details the logistics of Chicago rentals, including why weekday bookings are 20-30% more affordable and how to negotiate itemized quotes that include fuel and mileage.
: This scholarly entry tracks the history of Chicago ground transportation from the 1853 Parmelee Transportation Company to the rise of John Hertz's Yellow Cab Company in 1915.
For a more academic perspective, these resources document the evolution of luxury transportation in the "Windy City."