| The Dark Side of the Moon | 1976 |
| The Summer of the Haunting | 1993 |
| The Secret Line | 1995 |
| Now and Then | 1995 |
| Two Gentlemen Sharing | 1997 |
| Kitty | 2004 |
| Gate Series | |
| The Gate of Eden | 1974 |
| The Land Beyond | 1975 |
| Return to the Gate | 1975 |
| Magician's House Series | |
| The Steps Up The Chimney | 1990 |
| The Tunnel Behind The Waterfall | 1991 |
| The Door in the Tree | 1991 |
| The Bridge in the Clouds | 1992 |