It is a question that inquisitive readers 4 to 8 are likely to ask, and this book answers it with general introductions to the professions associated with such workplaces as a hospital (doctor, midwife, physical therapist); university (provost, astronomer, lecturer); theater (actor, usher, make-up artist); and construction (architect, carpenter, electrician). Shown in colorful retro illustrations, the other sites explored here include a school, a farm, a hotel, an airport, a gym, and a concert hall.