Assuming you mean why, not when, it's because it can't be finished before then, and they always realease books a few months after being finished. So, since Michael Buckley has just finished the first draft of the book now, and is working on that, it's going to take him a few more months to finish the next drafts, and some possible work on other series of his. So the eighth book, The Inside Story, will probably come out in about May 2010 or so.
December 2009, January 2010
Spring 2010, I think lol
The 8th book, The Inside Story, was released in 2010.
The last sisters grimm book has already come out!
Sisters Grimm book six has already come out and is available in hard cover at most book stores. May 01, 2008
The next sisters grimm bokk will probly come out sometime in 2011- Chloe Minella
The 8th book as not come out yet. It comes out on May 1, 2010 but you can read part of the book at thesistersgrimm.com.
The 8 sisters Grimm book has already come out. I have read it. So the plot thickens.
Spring 2011.
yes it has already come out
2011 or 2012.
well the 8th book came out sometime in 2009 or 2010 so it should probably come out sometime in 2011 or 2012