It was reprinted in 1973 as The Book of Weird as there was only a brief mention of the glass harmonica in the original work.
In 1969, she began writing and illustrating a series of books for young readers beginning with The Haunted Spy[1] about a retired spy named Hannibel Stern who with his dog Zero retires to live in a castle on an island, making friends with a 400-year-old ghost Sir Roger de Rudisell (Byfield's mother's maiden name) who advises him.
Collaborating with Frank Tedeschi, Byfield co-authored four adventures of a clerical detective Rev.
Dr. Simon Bede and photographer Helen Bullock with their investigations recounted in Solemn High Murder (1975), Forever Wilt Thou Die (1976), A Harder Thing Than Triumph (1977), and A Parcel of Their Fortunes (1978).
[2] Byfield also illustrated works for other authors such as Donald Hutter's Upright Hilda (1968), Harvey Swados' The Mystery of the Haunted Mine (1971), William H. Armstrong's Hadassah: Esther the Orphan Queen (1972) and Herb Caen's The Cable Car and the Dragon (1972).