Tips include sage advice on topics such as "scanning the rows" and "filling in the gaps." Based on title alone, it's pretty clear that the author personally infiltrated the invisible floating MENSA fortress and wrestled secret Sudoku strategies out of the cold hands of dead Nobel Prize winners. The intellectual level of the average reader? Well, "scanning the rows" is split up over three separate tips. But it's not until you get to the part where two separate tips are given over to "taking a break" that you realize that the book you're reading was written after this phone conversation:
Publisher: We need a Sudoku book right now before the idiots lose interest!
Maths guy: How long have I got?
Publisher: The courier's on his way!
The fact that this book has specifically 52 great Sudoku-solving secrets is terrifying. The implication is that somebody might need to take a week to digest every tip about the secret mysteries of number writing over the course of a year, and that this person might be wandering around bookshops loose and looking for a car that looks interesting enough to walk out in front of. Nevertheless, at least this book keeps them safely occupied sucking the lead out of pencils, otherwise their stubbornness, ready cash and need for instructions for even the simplest of tasks could lead them to less benign pastimes.
What You Could've Bought:
How to Live a Life That's Not Boring