The Cadillac BOOK service lets users enjoy the variety of Cadillac vehicles on-demand. Reservations are made through a smartphone app that makes it easy for members to select their preferred car. Once the model of choice is selected, it is delivered via a ‘white glove’ concierge service to wherever you are. If you feel like switching to a new car, you simply trade it in for another one. Subscribers can switch cars up to 18 times a year, with no limit on mileage. The perks are evident – a new car every month, no need to worry about car registration, taxes, insurance, and maintenance, no long-term commitment of leasing, financing, or buying.