34 books • 6 series
The Ghost of the Isherwoods
The Tree House Mystery
Remember Me When I'm Dead
Kate Be Late
The Key to the Playhouse
Good Charlotte (Lucky star)
Please Write-- I Need Your Help!
Pudmuddles
The Secret House
Rabbit Magic
Once Upon a Dark November
Miss Know It All and the Good Day Mice
Miss Know it All and the Magic House (A Bantam-Skylark book)
Miss Know it All and the Three-Ring Circus (A Bantam-Skylark book)
Miss Know it All and the Wishing Lamp (A Butterfield Square story)
Where Evil is
Secrets in the Attic (Apple Paperbacks)
On That Dark Night
Miss Know It/Returns
The Ten O'Clock Club
Stray Dog
The Look-Alike Girl
When Midnight Comes
I Will Make You Disappear (Piccolo Books)