Last I used Apress, after placing the order they had writing at the bottom of the order confirmed page to the effect of:
"We didn't ask for your permission, but regardless we've added you to our marketing email list and the only way to unsubscribe is to contact our customer service team."
Never mind the Apress, the book is also available or Amazon or other bookstores. The material that this book covers is very impressive and the author knowledge even more, he has some of his womrshops/conference speaches available on yt
It's the first and last time I've used them.