Penguins and Polar Bears was initially released in the UK in March 2020. It was released in North America by Trafalgar in early October.
Please use this link if you live in the UK: www.thehistorypress.co.uk/publication/of-penguins-and-polar-bears/9780750990578/
Please use this link if you buy your books from a North American bookseller:
https://www.ipgbook.com/of-penguins-and-polar-bears-products-9780750990578.php?page_id=21
The following links will take you to places where you can buy the book, wherever you may live:
www.abebooks.com/servlet/BookDetails
wordery.com/of-penguins-and-polar-bears-christopher-wright