Environment file is shared. The code from book is not shared as its more of a code-along book. Sharing code means creating a copy of book.
You can buy the book via these links:
USA: https://www.amazon.com/dp/8269211508
UK: https://www.amazon.co.uk/dp/8269211508
Germany: https://www.amazon.de/dp/8269211508
France: https://www.amazon.fr/dp/8269211508
Spain: https://www.amazon.es/dp/8269211508
Italy: https://www.amazon.it/dp/8269211508
Japan: https://www.amazon.co.jp/dp/8269211508
Canada: https://www.amazon.ca/dp/8269211508