Each book acts as guide on a tour conducted through a rocket base, a steel mill, a clothing factory. Every preliminary step to launching a satellite is explained in detail at the rocket base. We tour the Central Control Building, the checkout hangar and the Liquid Oxygen plant. We are there the second day to see the rocket soar into space. Prior to entering the steel mill, mountains of raw materials and coke ovens attract our attention. Coke, made from coal is used as fuel for the blast furnaces which produce iron. How much like a gigantic stew is the mixture of ingredients that make iron. Once in the open hearth, the iron is converted to steel which is subsequently wound around spools, ready for manufacture. Less exciting is our tour of the clothing factory where we observe each operation in the manufacture of a shirt from designing, pattern-making, cutting, sewing and finishing through to the shipping room. Although topics differ, the treatment is essentially the same. Clarity and brevity are outstanding features in all three. Good source material in terms of subject matter and handling for Social Studies curricula in second through fourth grades.