Wanda Kay Knight 
Peacock Door [EPUB ebook] 

In a magical tale of adventure, eight cousins sneak through forbidden treehouse doors only to find themselves separated from each other and lost in strange worlds. In their quests to return home, they must unravel mysteries, escape snares and villains, find one another, and search for the elusive Oracle. The Peacock Door is a rich story of camaraderie, loyalty, and determination with a bit of whimsy sprinkled throughout.