Merry Murdle: 25 Fiendishly Festive Logic Puzzles

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Mini LUK Visual Perception Pack 1 (Set Of 2 Books) Brand New Sealed

Two fiendishly difficult puzzle books; one math, one visual perception

Logic Grid Puzzles, Volume 1: From Easy to Fiendishly Hard (Logic Puzzles fo...

Homework for Grown-Ups Quiz Book: Fiendishly fun question... by Foley, Elizabeth

miniLUK Advance Learning System with 17 Activity Books – Visual Perception, Math

Merry Murdle: 25 Fiendishly Festive Logic Puzzles Paperback by G T Karber