Rainsford made the Malay man-catcher, but didn't succeed. He then created the Burmese tiger pit, that killed one of the hounds. He then did a trap that he learned in "native Uganda" by fastening his knife to a sapling and killing Ivan. The last trick he did hiding behind the curtains in General Zaroff's room and scaring him.
It is John Gardner's novel "Grendel" from 1971 that initiated the trend of telling a story from a monster's point of view. The story is essentially the epic poem Beowulf spoken trough the eyes of Grendel