writer Daniel Knauf, but at the end of 2012 Reznor said that the project was "in a holding state". Ghosts I–IV and The Slip (2008–2012) In February 2008, Reznor posted a news update on the Nine Inch Nails website entitled "2 weeks". On March 2, Ghosts I–IV (the first release on The Null Corporation label), a 36-track instrumental album, became available via the band's official website. Ghosts I–IV was made available in a number of different formats and forms, ranging from a free download of the first volume, to a $300 Ultra-Deluxe limited edition package. All 2,500 copies of the $300 package sold out in three days. The album is licensed under a Creative Commons Attribution Non-Commercial Share Alike licence. The album was created improvisationally over a 10-week period and contributors included Atticus Ross, Alan Moulder, Alessandro Cortini, Adrian Belew, and Brian Viglione. Similar to the announcement that ultimately led to the release of Ghosts I–IV, a post on the band's website in April 2008 read "2 weeks!" On May 5, Nine Inch Nails released The Slip via its website without any advertisement or promotion. The album was made available for download free of charge with a message from Reznor, "this one's on me," protected under the same Creative Commons licence as Ghosts, and has seen individual downloads surpassing 1.4 million. The Slip has since been released on CD as a limited edition set of 250,000. Since the release of Ghosts I–IV and The Slip, a 25-date tour titled Lights in the Sky, was announced in several North American cities, and was later expanded to include several more North American dates as well as dates in South America. Cortini and Josh Freese returned as members from the previous tour, while Robin Finck rejoined the band and Justin Meldal-Johnsen was added on bass guitar. Freese and Cortini left the live band, but it became a quartet with the addition of Ilan Rubin on drums. On January 7, 2009, Reznor uploaded unedited HD-quality footage from three shows as a download of over 400 GB via BitTorrent. In an immediate response, a fan organization known as This One Is On Us quickly downloaded the data and had begun to assemble the footage alongside its own video recordings to create a professional 3-part digital film, followed by a physical release created "by fans for fans". This tour documentary became collectively known as Another Version