The ISBN of The Emerald Wand of Oz is 978-0060296087.
The Emerald Wand of Oz was created in 2005.
The Emerald Wand of Oz has 272 pages.
The ISBN of The Emerald Route is 9780865780750.
The ISBN of Paradox in Oz is 1929527012.
The ISBN of A Barnstormer in Oz is 0932096182.
The ISBN of The Runaway in Oz is 9780929605395.
The ISBN of Mister Tinker in Oz is 0394970381.
The ISBN of Queen Ann in Oz is 9780929605258.
The ISBN of The Giant Garden of Oz is 0929605411.
The ISBN of Trouble Under Oz is 978-0060296094.
The ISBN of Bloodstained Oz is 0-976-63396-5.
I hope that whoever answered this question before visits this question again. I was doing a minor change, in the sense of just adding the names of the sequels. And then the screen blanked, and everything was lost. Yes. The Baum Family Trust has commissioned a quartet. Three of the four titles are known. The first two, The Emerald Wand of Oz [2005] and Trouble under Oz [2006] already are available. The third title is Sky Pirates of Oz. This arrangement is between the Trust and author Sherwood Smith [b. 1951].