Dead Simple by Peter James

It was meant to be a harmless stag night prank. A few hours later four of his best friends are dead, and Michael Harrison has disappeared. With only three days to the wedding, Detective Superintendent Grace - a man haunted by the shadow of his own missing wife - is contacted by Michael's beautiful, distraught fiancee, Ashley Harper. Grace discovers that the one man who ought to know Michael Harrison's whereabouts is saying nothing. But then he has a lot to gain - more than anyone realizes. For one man's disaster is another man's fortune.

I thoroughly enjoyed this book ... and it definitely had some cringe-worthy moments a-la Dark Video. Buried alive ... not my idea of fun times, truly. And again highlights why I'm terrified of bachelor parties.