防詐3要訣：不聽信、不操作、掛斷電話 
Pretty Pocket Sudoku - Progressive Medium to Hard for Self-Improvement: Minimal Small Travel Size Logic Puzzles 4 x 6 Inches Brown Earth
PRETTY PCKT SUDOKU - PROGRESSI
內容簡介
You've mastered the basics. Now it's time to sharpen the edge.
Medium sudoku used to take real concentration. Now you finish a grid and barely notice you did it. That's not a bad thing - it means you're ready for more. But "more" usually means one of two disappointing options: another book of medium puzzles pretending to be harder, or a leap straight into expert-level grids that leave you staring at an almost-empty board, unsure where to even begin.
This book is built for the space in between.
This pocket-sized sudoku book is designed for solvers ready to move past medium and into real challenge - without the frustrating jump that makes most "hard" puzzle books feel more punishing than satisfying. Twelve levels carry you there: six steady steps through medium, then six more through hard, each one a small, deliberate increase from the last. Nothing sudden. Nothing unfair. By the final page, you're solving genuinely hard puzzles - built up to, not thrown at you.
Inside are 108 puzzles, one per page, in a clean, uncluttered layout with plenty of room to write, erase, and work through your logic without a crowded grid fighting you for space. Prefer to solve in pencil and second-guess yourself? There's room for that too. A full answer key is included in the back, so you can check your work as you go, settle a stubborn puzzle before bed, or simply keep moving without breaking your flow.
At just 4 × 6 inches, it fits in a coat pocket, a handbag, or the seat pocket in front of you - ready the moment you find a spare five minutes. Waiting for a coffee order. Sitting in a car park before an appointment. Winding down at the end of a long day. This is a book built for those in-between moments, not just a desk or an armchair.
The minimal cover - cream on warm browns - was designed to feel calm on a shelf and calm in your hands. No clutter, no noise, no numbers competing for attention before you've even opened the page. Just a clear grid, nine numbers, and a path from confident to sharp.
A pocket-sized sudoku journey - start steady, finish hard.
規格
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