Sixty detective cases in one printable book, 65 pages: 20 logic grids, 15 coded notes, 10 witness matches, 10 timelines and 5 five-suspect final cases. Difficulty stars sit on every case header, from one-star warm-ups to three-star finals.

Each case has exactly one answer. Puzzles were built solution-first and checked by a solver, so the printed clues allow only the keyed solution. Answer keys cover all 60 cases on pages 63-65 and spell out the reasoning for the five finals, so you can check why every other suspect is out.

Two PDFs, same 65 pages: A4 and US Letter. Print at 100 percent, grayscale-safe, 15 mm margins that fit standard hole punches. The decoding method for every cipher (Caesar, atbash, keyword, number codes) is printed under each coded note. Personal use: print freely for your household, classroom, puzzle club or road trip.