His erotica bibliography consists of 14 interrelated novels that were published in the late 70's and early 80's. Below are the titles in chronological order.
The Trembling of a Leaf (1971) The Enjoyment of Amy (1973) The Pleasures of Cloris (1974) Replenishing Jennifer (1975) Up in Mamie’s Diary (1975) Between Cloris and Amy (1976) The Naked Countess of Liechtenstein (1976) On Or About The First Day In June (1976) Two Nymphs Named Melissa (1979) The Seduction of Marianna (1980) The Delights of Anna (1980) The Enticement of Cindy (1981) Barefoot on Jill (1983) Interjecting Valerie (1986)
Bill travels to Charleston, to meet and get to know Amy, now infamous since the publication of her nephew's book about her, The Trembling of A Leaf(this series is becoming very self referential). After a brief affair, Bill whisks her off to Italy to film a porn version of Monna Vanna with Cloris. Once there, she is enjoyed by both Bill and Cloris until they are, as Cloris puts it, "all fucked out".
So now we have the intermingling of the John Dellmore and Bill Benton narratives, even though Dellmore hasn't been seen since the second book, The Enjoyment of Amy. Colleton/Marks, once again writes lovingly of Italy, the food, the wine, the towns, and the women, and he seems to have a particular fondness for the women of Abruzzi. Amy is the main obsession though, and she gets a lot of words and pages devoted to her "body like Raquel Welch" and her fleur-de-lis tattoo. First published by Signet in September 1976.