  Modern-day software development is often facilitated by the reuse of
third-party software libraries. Despite the significant effort to understand
the factors contributing to library selection, it is relatively unknown how the
libraries are selected and what tools are still needed to support the selection
process. Using Straussian grounded theory, we conducted and analyzed the
interviews of 24 professionals across the world and derived a model of library
selection process which is governed by six selection patterns (i.e., rules).
The model draws from marketing theory and lays the groundwork for the
development of a library selection tool which captures the technical and
non-technical aspects developers consider.
