Leave him be. There is nothing wrong with announcing a Dharma event or book if one thinks the blurb promises a good read.
If the post in this category of 'Book Reviews' is causing hyperventilation - then have a 'Book Announcement' forum or move it to the Lounge.
Revealing one essence: this means the inherently pure, complete, luminous essence, which is pure of its own nature. -- Fa-tsang