The smart way to deal with this:
Have Sarah’s book publisher bring a lawsuit against the other company, for deliberately copying the basic elements and layout and introducing the book at the same time as theirs to confuse and take advantage of people looking for Sarah’s real book, not their spoof book.
It’s too close to the original. Plenty of case law out there. It’s a cheap chinese knock-off.
“Trade dress” would be the best approach, imho. I’ve been peripherally involved in a multi-decade set of lawsuits in the apparel industry, due to such a dispute.
At a minimum, they can get the knock-off “spoof” removed from the shelves during the critical early weeks and months, and that’s what matters.
I can’t quote the legalities, but this is an obvious intent to trade on the name of Sarah’s book, which IS the purpose of most all copyright and trademark law.