I can't imagine caring what Mensa thinks anybody should read, let alone thinking that anybody should care what I think about what Mensa thinks anybody should read. And between the interminable list of several-sentence-long book reports (...why?), the writing is just one bland, melodramatic, Very Emphatic "not X but Y" after another.
Groucho's quote "I'd never be a member of any club that would have me as a member."
And one of our favorite Columbo episodes (all free on Tubi) that features a murder in a very Mensa-style club, titled "The Bye-Bye Sky High I.Q. Murder Case".