Drive any Cadillac, anytime, for $1,500 a month GM's new Book by Cadillac service sure is an interesting concept. Kind of a lease, kind of a rental, kind of ownership... Basically, you pay a flat fee of $1,500/mo and can always drive a brand new car, which can be any vehicle in the whole Cadillac line, all of which get configured maxed out with options. There's a one-time setup fee of $500, but no fee to change out to a new vehicle, which could be done as many as 18 times a year. There are also no long-term commitments required, so you can quit at any time without paying a penalty. The monthly fee includes insurance and regular maintenance. I'm assuming the fee also covers taxes and registration. For now, the service is available only to people in the New York City while they judge if this is a service to add to new locations.