How to catch monsters.

Dreamed about a book that (I think) was about how to catch monsters.  I saw a red monster on a red raft in a red ocean.  I think a good way to catch them would be to put out piles of stinky gym socks, with some sort of a lasso buried in the middle.  When they came out of the dark to feast on the stinky socks, you pull the rope from within your fortress of pillows and blankets.  Something like that.