In October 1955, Hans Stefan Santesson, an American writer, editor, and reviewer, began contributing "Universe in Books", the regular book review column. A year later, with the September 1956 issue, Santesson took over from Margulies as editor. One immediate change was an increase in the number of articles about UFOs. Santesson ran several articles by Ivan T. Sanderson, among others, including articles on auras and on the abominable snowman. However, he also ran polemical articles opposed to the UFO mania, including strongly worded pieces by Lester del Rey and C.M. Kornbluth. Del Rey, at least, felt that Santesson was not a believer in UFOs: "So far as I could determine, Santessen was skeptical about such things, but felt that all sides deserved a hearing and also that the controversies were good for circulation."