Because “Of Penguins and Polar Bears” was released in the UK, it is not readily available through international book resources.
Please use this link if you live in the UK. www.thehistorypress.co.uk/publication/of-penguins-and-polar-bears/9780750990578/
While it was originally planned that there would be a North American release in October 2020, there has not been confirmation of this, and the release may be delayed because of the pandemic. Checking Amazon.com and ca shows this October release, the book is available through Amazon.co.uk. In the meantime, the following four links will take you to places where you can buy the book, wherever you may live: