Book excerpt: New Release from best-selling author Liz Mistry: number 6 in her D.I. Gus McGuire series.Social Media can be the death of you ...The SnapchatA twisted killer comes to the attention of DI Gus McGuire and his team when a teenager receives a Snapchat image of his murdered friend. The KillerAs the killer becomes bolder, using social media to publicise the murders, Gus fears there may be more than one murderer targeting young people.The StalkerMeanwhile, Gus comes under threat from a stalker who is not afraid to get up close and personal.Can Gus protect his loved ones and catch the killer before another Snap is received?Readers love Liz Mistry'I have great admiration for Mistry's skill, this is one of the best crime thrillers I've read in ages.''Absolutely fantastic read.''Simply unputdownable.''Devoured in two days.'