From their website:
Last week, we announced that the Tannhäuser Revised Edition Rulebook is available at your retailer and our webstore. At that time, due to technical issues, we weren’t able to provide the pdf version originally promised. We’re pleased to announce that these issues have been resolved, and that the Tannhäuser Revised Edition Rulebook is now available for download at drivethrurpg.com and rpgnow.com.
The Tannhäuser Revised Edition Rulebook improves upon the innovative mechanics of Tannhäuser. This 96 page perfect-bound book is intended as a comprehensive replacement to the original Tannhäuser rulebook; it includes revisions to the core game rules, as well as those originally found in the Operation: Novgorod expansion, along with the Wolf, Yula, Gorgeï, and Ramirez single figure packs.