I am reviewing the novel A Tap On The Window by Linwood Barclay which is a very good thriller which I bought from a local supermarket. I think Linwood is one of the best thriller writers currently writing and I did quite enjoy reading this book which has only just been published in Britain. The book is around 500 pages so is a decent length. The plot concerns a father whose sone jumped off a roof after taking bad recreational drugs and had been missing for some time. The father is determined to find out who is responsible for selling him the dodgy drugs. He is at a traffic lights in the rain and a young lady who knew his son is desperate for a lift and also another rather dodgy motorist has made her a bit fearful for her safety so he agrees to give her a lift. In his search to find the dubious drug dealer he agrees to buy that lady and her friend some drugs each and also he ends up taking some. The drug is what I think is called MDMA although in the book they use the proper name. Anyway both of the die as a result and he is fearful of ending up on multiple murder charges. The only solution is for him to get to the bottom of what is going on. The story is set in Toronto which is Linwood's home in Canada. Apparently he used to be a columnist for the Toronto Star. He has written quite a few thrillers and does seem quite consistent. The novel also has quite a happy ending & I would recommend it.