There is an archive available of a webinar last week about Book Sprints. The event featured Book Sprints participants and facilitators discussing a specific Book Sprint as a use-case. The link for the archive of the event is below followed by a link to the book.
https://www.booksprints.net/2020/09/07/book-launch-webinar/
The academic text which was the output of the Book Sprint has been published here.