Terrifying and bizarre, At The Mountains Of Madness plumbs and disturbs the depths of the human psyche. I loved the vivid, detailed descriptions of the depths these two unfortunate protagonists unearthed, and the sense of tension and suspense as they descend deeper into the abyss. Lovecraft's writing style can at times be verbose, but at its best the often archaic language he uses serves to heighten the sense of otherworldly trepidation his literature invokes in the reader. I also loved that, at least to me, much of what makes the story so terrifying is the way it wriggles its way into the darkest recesses of the mind, and plays with the human tendencies towards fear of the unknown but also a morbid curiosity As with many of Lovecraft's stories, there is a slow start, but as the plot progresses it builds greater momentum, and by about a third of the way through I was utterly gripped and could not put it down until I had finished it. One of the best stories I have read in a long time.