What's inside
The book opens with a cover and a one-page statement of the rules — one queen in every row, column and color region, no two queens touching — then the boards, four to an A4 page, sized for a pencil. Every board is Hard tier, and they run easiest first, so the book itself builds as you go. Boards print in the same colors as the site, with a heavy outline around every region so a black-and-white printer still gives a solvable board.
Every board is a released daily puzzle, checked by our solver to have exactly one solution reachable by logic alone. If you feel the urge to guess, you've missed a move — and the Hard Queens guide covers exactly the moves this tier asks for.