Knurek, Jeff books & textbook
Britannica Brainbusters: Challenging Puzzles for the Curious-Minded
Triumph Books /2015-05-01 Paperback / 192 Pages
isbn-10: 1629370959 / isbn-13: 9781629370958
Mystic Jumble?: Puzzles to Bemuse and Bedazzle You! (Jumbles?) by Tribune Content Agency LLC (2015-09-01)
Triumph Books / Mass Market Paperback