Not a lot of info out there on Eva. She was born in Austria, raised in England and considers herself British, and writes for children and adults. Her kids' books tend to be fantasy, and are often suggested as good followups to the Harry Potter books, particularly The Secret of Platform 13. Her adult books are generally romance novels, and people say they're good. Her sense of humor runs strong through all her writing, and whether it's a fantasy or a somance, her plots are rooted in well-developed characters.
Books:
A Countess Below Stairs
Dial a Ghost
The Great Ghost Rescue
Haunting of Hiram
Island of the Aunts
Not Just a Witch
The Secret of Platform 13
A Song for Summer
Which Witch?
thanks to:
http://www.avnet.co.uk/home/amaranth/Books/ASFS.htm
http://www.theromancereader.com/reaction6.html
www.amazon.com