Vivian Vada Valda and Cynthia

Vivian Vande Velde
http://www.fantasticfiction.co.uk/v/vivian-vande-velde/

Series
User Unfriendly
User Unfriendly (1991)
Heir Apparent (2002)
Deadly Pink (2012)

Novels
A Hidden Magic (1985)
A Well-Timed Enchantment (1990)
Dragon's Bait (1992)
Companions of the Night (1995)
The Conjurer Princess (1997)
Spellbound (1998)
A Coming Evil (1998)
Ghost of a Hanged Man (1998)
Smart Dog (1998)
The Changeling Prince (1998)
Never Trust a Dead Man (1999)
There's a Dead Person Following My Sister Around (1999)
The Rumpelstiltskin Problem (2000)
Magic Can be Murder (2000)
Alison, Who Went Away (2001)
Wizard at Work (2003)
Witch's Wishes (2003)
The Book of Mordred (2005)
Three Good Deeds (2005)
Witch Dreams (2005)
Now You See It . . . (2005)
Remembering Raquel (2007)
Stolen (2008)
Cloaked in Red (2010)
8 Class Pets 1 Squirrel / 1 Dog = Chaos (2011)

Collections
Once upon a Test: Three Light Tales of Love (1984)
Tales from the Brothers Grimm and the Sisters Weird (1995)
Curses, INC.: And Other Stories (1997)
Tales from the Homeplace: Adventures of a Texas Farm Girl (1999)
Being Dead (2001)
All Hallow's Eve (2006)

Picture Books
Troll Teacher (2000)

Cynthia DeFelice
http://www.fantasticfiction.co.uk/d/cynthia-defelice/

Ghost Mysteries
The Ghost of Fossil Glen (1998)
The Ghost and Mrs. Hobbs (2001)
The Ghost of Cutler Creek (2004)
The Ghost of Poplar Point (2007)

Novels
The Strange Night Writing of Jessamine Colter (1988)
The Dancing Skeleton (1989)
Weasel (1990)
Devil's Bridge (1992)
The Light on Hogback Hill (1993)
Lostman's River (1994)
The Apprenticeship of Lucas Whitaker (1996)
Nowhere to Call Home (1999)
Death at Devil's Bridge (2000)
Cold Feet (2000)
Under the Same Sky (2003)
The Missing Manatee (2005)
Bringing Ezra Back (2006)
Signal (2009)
Wild Life (2011)