The Wells of Fog (Danish Tågemesterens Brønde) is a novel set in the W.I.T.C.H. universe. It was written by Cecilie Eken and, to date, does not have an English translation.
A mysterious fog rolls in over Heatherfield. Hay Lin hears a voice cry out for help, and in a puddle Irma sees a little girl holds a pleading hand up towards her. Someone needs W.I.T.C.H. badly, but Matt's grandfather is in the hospital, so Matt urgently need Will.
Irma, Taranee, Cornelia and Hay Lin have no doubt – they must leave immediately find the child and fight the fog. Will feels torn and confused. Will she always have to lie and lead a double life? What should she choose: the Heart of Kandrakar or Matt.