This entry was published at least two years ago (originally posted on September 2, 2019). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.
Book forty-five of 2019: Stranger in a Strange Land, by Robert Heinlein. ⭐️⭐️⭐️⭐️ 1962 Hugo Best Novel
Good story, and this was very likely one of my earliest introductions to any sort of consensual non-monogamy ideas, but gender role and sexuality issues bother me.
