The 2015 Unconventional Yearbook presents the most important facts and figures on the Top 20 US resource plays. This fifth edition of an annual series of data books provides an overview of current activity with snapshots of the regional plays, profiles of key players, a review of technology, a look at midstream activity, economic analysis and data, and a bibliography. Like the playbooks, the Unconventional Yearbook includes a full-color shale wall map.