For about a year now there has been an excellent read: "The Vagina Bible: The Vulva and the Vagina. Separating the Myth from the Medicine" by Dr. Jen Gunter (published August 2019). The book tackles all questions you might have had about the subject, and some you did not know you wanted to ask.
Just recently a new book came out by Dr. Piet Hoebeke (published Nov 2020): "Members Club: A User's Guide to the Penis". It is another very informative and accessible text, geared towards all who might or might not have a penis.
Between the two texts, covering in depth questions for all genders, the information is easily accessible and providing comprehensive information on most subjects relating to sex/sexual organs/ physical development and health.