the book is definately worth the £27 , its a hard back book with maybe 20 or so effects and it explains most of the sleights needed for each of them. Also it reveals darwins method of getting a brand new deck into a Si Stebbins system with only a few shuffles (worth the price alone in my opinion)
so you wouldnt only be getting 1 trick for your £27
PLUS i will point out that this is not a site for trading secrets to effects.. if you read the forum rules regarding trades
HERE you'll get an idea of what im talking about