The public’s interest in Amanda Knox — aka Foxy Knoxy — may be waning, and one of the major broadcast networks could suffer as a result. According to The Hollywood Reporter, presales for the April 30 publication of "Waiting to Be Heard," a memoir by Knox, have been tepid.

Meanwhile, ABC is poised to present what was intended to be a splashy, high-profile interview with Knox.

Knox is an American student who was accused of murdering her roommate in Italy. Waning interest in her book raises questions about how Diane Sawyer’s heavily promoted interview with Knox will fare in the ratings, the story adds.

Sawyer will interview Knox in an "ABC News Primetime Special" on the book’s publication night.

Knox spent four years in an Italian prison before her conviction of murdering her British roommate, Meredith Kercher, was overturned. The case drew attention in both the U.S. and Britain, and publishers and TV networks tried to secure her story following her release from prison.

"Waiting to Be Heard" has been ranked between No. 100 and No. 600 on Amazon’s sales charts this week, the story says.

"Given the publicity surrounding the book, including a heavy round of promos on ABC hyping its exclusive publication-night special, reasonable expectations would have seen the book move into the top 50," the piece notes.

Amanda Knox