She wrote short fiction and covered film stars for magazines, and co-wrote celebrity autobiographies.

[7] Canfield was "considered one of the most prolific free-lance writers in Hollywood today," according to a 1947 profile,[5] Her byline was frequently seen in celebrity magazines in the 1940s and 1950s, including Motion Picture Magazine, Screenland,[8][9][10] Liberty, Screen Stars,[11][12] Screen Guide, TV Revue,[13] Coronet,[14] and Movieland.

She co-wrote autobiographical books with director Mervyn LeRoy[15] and cosmetic surgeon Robert Alan Franklyn.

[16] Her final book was God in Hollywood (1961) which was an attempt "to document the religious lives of movie stars.

[22] "Despondent over a lengthy illness,"[23] she died by suicide in 1963, at the age of 54, on the Ventura Freeway in Encino, California.