Here are the release dates for the different editions of the book:

Print Edition (Hardcover): 01 September 2019 – ISBN: 978-1-9161495-0-2

iBook Edition: 01 August 2019 – ISBN: 978-1-9161495-1-9

PDF Edition: 01 August 2019 – ISBN: 978-1-9161495-2-6

Audiobook: 01 October 2019 – ISBN: 978-1-9161495-3-3