Allen, Robert <br/><br/>
The Ultimate Mental Challenge  Over 500 different puzzles to give your brain the ultimate workout 

 - Calton  Mensa Publications  c1995 
 - 304pages;  illustrations: 
<br/><br/><label>ISBN: </label>1858681162 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental Challenge
<br/><br/><label>LC Class. No.: </label>RC 469  / .A33 1995