This book is insulting to readers of average to above-average intelligence.
To say it is difficult to get published is one of the understatements of the century. It is almost IMPOSSIBLE to get published these days. Average writers can forget it. Good writers, probably not. Great writers, maybe... just maybe, if your agent and the publisher are in a good mood.
Therefore, you don't see much drivel making it to print anymore. I don't even know if this book is good enough to be called drivel. The immature writing is below sub-par and the characters are so flimsy that they don't even qualify as "cardboard". Even the basic premise of the book is so thin, it should never even have been made into a short story.
But I guess, when your mother is one of the most exhaulted mystery writers of all time, you're allowed to vomit text on to a page and expect to get it printed. Must be nice.