Hi,

The post is a re-worded/spun version of the content in that book.
Possibly with the use of AI spinning.
You did not mention in the post that you are re-wording content from that book.
By not declining the rewards on the post, you submit it for monetisation and so automatically claim to be the author of the writing.

This is PLAGIARISM. If you tried to submit such an article to a University or as part of your book, you would face legal consequences in real life.