A collection of leaflets dealing with a wide variety of building materials and technologies designed to assist 'grass-roots technologists' who are actively involved in shelter construction or improvement, either as actual builders or in an advisory or teaching capacity. While efforts have been made to describe and illustrate the technologies in a way to be easily understood by non-professional users, some elementary knowledge of building and construction is required to ensure successful application. The leaflets are meant to introduce promising technologies and present several options for a variety of materials and building components, so that the user can make a suitable choice, depending on the resources available locally.