Estimated Release Dates:

Sequential Spelling Vol. 1 Released Nov. 1, 2009

Sequential Spelling Vol. 2 Released Jan. 29, 2010

Sequential Spelling Vol. 3 Released Jun 30, 2010

Sequential Spelling Vol. 4 Released Nov. 28, 2011

Sequential Spelling Vol. 5 Due Jul. 1, 2012 

Sequential Spelling Vol. 6 Due Jul. 1, 2013

Sequential Spelling Vol. 7 Due Jul. 1, 2014