You have clearly missed every females (and some males) objection to the title. Why is this list limited to men, as indicated by the title? Why could the Thomas Oppong not have made the title more general and open to each and every being on this earth. If they are such life-changing books, could it not have been a list for all of humanity? P.s. Even the word ‘manhole’ is more forward thinking and inclusive than the title of this article… “A manhole may also be called an access chamber, utility hole, maintenance hole or inspection chamber.” And manifold’s origin has nothing to do with gender.