Horns by Joe Hill. Not really a straight "horror" novel, but one of the best novels in the genre that I've read recently. The concept is a bit like Stephen King meets Franz Kafka's The Metamorphosis. A young man wakes up, after blacking out during a night of drunken grieving over his murdered girlfriend, to discover that he has grown a pair of horns from his forehead. Then things begin to get really weird, as people begin to confess their ugliest, most shameful thoughts to him, and he discovers that he has the power to make people act on these dark desires. Highly recommended. Lucifer's Lottery by Edward Lee is good too, and may be of interest to Lovecraft fans. It's part of Lee's "City Infernal" series. A seminarian is informed that he has won an infernal lottery: if he gives his soul to the Devil, he will receive not only whatever he wants on earth, but a privileged place in the hierachy of Hell after death. The damned soul who is assigned to guide him on his tour of Edward Lee's version of Hell is none other than H. P. Lovecraft.