The revelation raised questions over Mr Arday’s employment at the University of Cambridge. Applicants for a professorship are required to submit an extensive portfolio of work.
The University of Glasgow, Ohio State University and Nelson Mandela University, in South Africa, all denied the academic’s claims that he had been a visiting professor at their institutions.
The University of Cambridge previously said Mr Arday had been the victim of a “vile campaign to undermine his credibility”.
However, it faced a staff revolt over its refusal to re-examine Mr Arday’s academic credentials and launched a new investigation hours after The Telegraph’s revelation about his book.
Palgrave Macmillan confirmed the project had been abandoned several years ago, although a spokesman would not comment on why.
Mr Arday’s memoirs are expected to be published by Simon & Schuster later this month.
Prof Kehinde Andrews, who was the UK’s first professor of black studies, claimed Mr Arday had been the victim of a smear campaign because he was black.
Asked about allegations of plagiarism surrounding Mr Arday, he told the BBC’s Today programme: “The journal articles [have] been investigated, are there to be changed, the journals are happy, there’s no story there.
“So the other stuff around ‘did he run a marathon’, I don’t know – I’m not sure why that’s relevant, I’m not sure why that would be newsworthy. It’s all part of a campaign to smear this individual because he’s black and at Cambridge.”