Stephen Barker of Digital Frontiers Media just finished up co-authoring a tutorial on the use of the Hierarchical Select (HS) module for Drupal with the module's author and maintainer, Wim Leers. Wim took time from his final exam preparations (thanks and congratulations, Wim!) to help Stephen understand the details of the module and Stephen documented this information in the form of an extensive description on the use of Wim's HS API. The two then worked together to shape it into a tutorial that will hopefully make integration of the module into other works easier.