Beresford, Ross. <br/><br/>
The listener crossword :  the world's most difficult crossword / 

 - London :  Times Books, HarperCollins,  2002. 
 - 192 p. ;  24 cm. 
<br/><br/> At head of t.p.: The Times 
<br/><br/><label>ISBN: </label>0007146329 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crossword puzzles
<br/><br/><label>LC Class. No.: </label>GV1507.C7