When I first encountered the Phoenix Project, I was expecting it to be some kind of satire. It wasn't, it was played straight all the way through and ends with "a win".
It blows my mind that someone could write a novel about work and NOT have it be a satire or dark comedy. This book is used in project management courses, by the way.
While I have no evidence in this particular case, if I wanted to promote a book, I could imagine making up a related, positive story, which just happens to mention the book positively, and posting it on a popular social media site (I put the book in my cart). Then one could follow up with a softball opposing story on another site to get some controversy and thus visibility.
Probably someone will cross link for you (I thought about doing that when I saw the headline). If not, a sock puppet can point out the link, and the book, again.
TBH these two stories have the exaggerated perfection that characterizes fake stories. And the fact that they arrived so close together makes me very suspicious.
I did like the book, back when I was completely new to DevOps. It's also a fictional story in the same vein as the one on reddit basically same template, but more mystic. Explaining DevOps through a story.
Now I'd suggest to just read the state of Devops reports by Google, they are excellent.