The Heavenly Excursion

This is a fictional Christian fantasy story that follows nine people who were given brochures to go on a "heavenly excursion", all expenses paid for - all they have to do is say that they're going on this trip and they're booked. The trip begins in Rome and then sets off to an unknown location to be revealed during the trip. In this Christian fiction story are those attending this heavenly excursion trip: two college roommates, a married couple, two missionaries, two friends, and a magazine...