Due to the COVID-19 outbreak, Diamond halted distribution of new releases after March 25 2020. However, book stores and websites such as Amazon that get their books through other distributors were not affected by the Diamond shutdown. As a result, this book was available for sale at Amazon and other book sellers first. Amazon officially lists a release date of 04/07/2020, however it appears that the book may not have been available until a week or so later.