well, #3 came out April 6th, 2010, about 2 or 3 years after the released date of the Kingdom Keepers 2, but i know for a fact there will be a #4, so i would expect in around 2013. (probably 2012, 2013, or 2014) so around 2012, 2013, or 2014.
Disney 365 - 2006 Kingdom Keepers was released on: USA: January 2012
Disney 365 - 2006 Kingdom Keepers 6 was released on: USA: 2013
Yes. It came out in 2o11. It is called Kingdom Keepers IV: Power Play. The Author of the series is Ridley Pearson.
The Kingdom Keepers book series by Ridley Pearson is as follows: Kingdom Keepers I: Disney After Dark Kingdom Keepers II: Disney at Dawn Kingdom Keepers III: Disney in Shadow Kingdom Keepers IV: Power Play Kingdom Keepers V: Shell Game Kingdom Keepers VI: Dark Passage Kingdom Keepers VII: The Insider
Keepers of the Kingdom - 2000 was released on: USA: 22 September 2000 (New York City, New York)
Disney 365 - 2006 Kingdom Keepers 3 was released on: USA: September 2010
The kingdom keepers 3 is about Wayne going missing, and the kingdom keepers have to search for him. Kind of like The Kingdom Keepers 2. Hope this helped! :)
Sometime in April. 2011
Disney 365 - 2006 Kingdom Keepers 2 was released on: USA: 25 August 2008
ridley pearson wrote kingdom keepers
The answer is The Kingdom Keepers 3: Disney in Shadows
Kingdom keepers iii Disney in shadow