About Book 4 of The Dark Echoes Series. · 7:57pm Dec 14th, 2015
Book 4 of The Dark Echoes Series explains a LOT of the goings on in the background of the 3 previous stories including why Pinkie's ritual to break the QDR's wall changed between books. And why Rainbow Dash's story mentioned Twilight interacting with her and telling her to stop Pinkie Pie.