MONSTERS ON THE PROWL (1971) #29

A Monster at My Window!, pencils by Jack Kirby, inks by Dick Ayers; An alien from another dimension threatens a science fiction writer, but the writer is secretly a hostile alien from a different dimension. A Monster Among Us, art by Joe Sinnott; A man encounters a lighthouse keeper who is a monster in disguise. The Spy, art by Bill Walton; An alien from a methane world learns the habits of earthmen to spy upon them for an upcoming invasion. The Joker!, art by Steve Ditko; A practical joker thinks that aliens are his victims playing a joke on him, but they are real aliens and take him to an off-world zoo.