Alfonsi, Alice. Whispers of doubt / adapted by Alice Alfonsi. - 1st ed. - New York : Hyperion Paperbacks for Children, 2006. - 144 p. : col. ill. ; 20 cm. - W.i.t.c.h. ; 20 . "Comic inserts inside!"--Cover. 008-012. ISBN: 9780786852819 078685281X (pbk.) 1415673071 (BWI bdg.) 9781415673072 (BWI bdg.) LCCN: 2005934655 LC Class. No.: MLCS 2011/42064 (P)