Books made to be finished.
There are a great many puzzle books in the world and most of them were made in an afternoon. You find out which kind you bought about forty pages in, when a sudoku turns out to have two answers, or a word in the word search is in the grid twice and the answers mark the wrong one.
One rule, applied stubbornly
A claim on the cover has to be something we can prove about every single puzzle inside, not something that is usually true.
That rule is more demanding than it sounds, and it is what most of the work goes into. It is the difference between testing a finished puzzle and hoping, and building it so the defect cannot occur — a sudoku clue is only removed if a single answer survives, a filler letter is refused if it would spell one of the answers, a coloring page is measured against the crayon that will fill it.
Nothing about that is glamorous. It is, though, the whole difference between a book you finish and a book you put down.
How a book gets made
Four steps, and not one of them moves on until a person says so.
It starts on paper
Every book begins as a plan somebody sits down and writes — the themes, the word lists, the subjects, the difficulty mix. Nothing is made until that plan is right, because a book started badly is a book wrong three hundred times over.
Built so it cannot go wrong
Every puzzle is built so the defect cannot occur in the first place, rather than made and then hoped over. Where checking is the only option, every single puzzle is checked and the result written down — a promise nobody measures quietly stops being true.
Read by a person
Every fact in a coloring book is read before it prints, and rewritten where it is not right. A wrong fact in a children’s book gets memorised, so it is treated as the binding constraint rather than a nice extra.
Laid out for paper
Gutters that keep artwork out of the spine, single-sided pages so felt tips do not ruin the next one, print large enough to write in. Choices somebody had to make on purpose, and the things you only notice when nobody did.
The name
A keen mind is not a clever one. It is an interested one — the kind that wants something to work at in the evening, or wants to know what a hedgehog eats while colouring one in. That is who these are for: children who are curious, and adults who never stopped being.
Why we bother
Keen Mind Books is small. Small enough that whoever chose what went into a book is the same person who checked it before it printed — which is less a charming detail than the reason anything on this page can be promised at all.
A publisher shipping puzzle books by the pallet cannot look at every grid, so it does not promise anything about every grid. We can, so the rule here is narrow and absolute: nothing goes on a cover that cannot be shown to be true of every single puzzle inside. The technique ladder, the filler that is not allowed to spell an answer, the crayon measured against the area it has to fill — all of it falls out of that one rule.
It is more work than the margin justifies, and we are aware of that. But a puzzle book is a quiet hour somebody has chosen to spend, and an hour that ends on a grid with two answers was never worth taking.
Say hello
Found a mistake in one of our books? We would genuinely like to know — that is the sort of thing the whole standard is built around.