H. G. Wells 
Secret Places of the Heart 

H.G. Wells was so charmed by Margaret Sanger that he based The Secret Places of the Heart on his time with her. The novel — a thinly-veiled autobiography — depicts an English gentleman, Sir Richard Hardy, who is attempting to sort out his marital problems while he travels the English countryside in the company of a psychiatrist. The Secret Places of the Heart was, in many ways, a love letter from Wells to Sanger… (Goodreads)