The second edition of Subsector Sourcebook 1: Cascadia is now available on Drive-thru RPG!
If you have already purchased (or were gifted) the PDF of this book, check your updates on Drive-thru, RPGNow or any of the family of OBS websites. You should have a complimentary copy of this book added to your update section. Just like Clement Sector, Cascadia will remain a free update for those who have purchased SS1: Cascadia until it is pulled down on May 22. Of course, if you go buy SS1: Cascadia 1e, you will also get a copy of Cascadia (OGL) along with your purchase.
Check it out at this link: http://www.drivethrurpg.com/product/181069/Subsector-Sourcebook-1-Cascadia-2nd-Edition-OGL-Version