This was revealed by Ibbo Mandaza, the publisher of the book in an interview with NewZimbabwe.com. He said:
The delay in availability of the book was due to complications with the ISBN number, which was issued by the National Archives.
It is believed that the ISBN number issued was fake and as a result, the book could not be registered on Amazon. A new ISBN number has been obtained and production of the book has resumed.
The stock of the book will be available on Amazon from the 30th of January 2020. Once this was uncovered only a limited number of books were printed for the (abortive) launch.
Mandaza also spoke about the 65-page PDF document that is circulating on social media purporting to be a copy of Excelgate.
He said the PDF document is a watered-down version of the 260-page book, with critical information removed.