Collins Little Book of Crossword Secrets :
Nothing is as it seems in a cryptic crossword and its riddles will remain impenetrable to the uninitiated eye. Collins has been publishing crossword books for decades and in the LITTLE BOOK OF CROSSWORDS SECRETS it has distilled its learning into a succinct guide that will help novice solvers begin to read between the lines. There are hints on how to decode clues and explanations of the various forms these can take; there are lists of the most useful words for crossword solving and ones detailing the obscure yet essential words which appear again and again along with much, much more.
Plenty of head scratching, brain wracking and pen chewing will still be required, but with Collins LITTLE BOOK OF CROSSWORDS SECRETS there is at last a chance of cracking every clue.