Books written by Robert A. Heinlein dealt with incest and the sexual nature of children

In books written as early as 1956, Heinlein dealt with incest and the sexual nature of children. Many of his books including Time for the Stars, Glory Road, Time Enough for Love, and The Number of the Beast dealt explicitly or implicitly with incest, sexual feelings and relations between adults and children, or both. The treatment of these themes include the romantic relationship and eventual marriage, once the girl becomes an adult via time-travel, of a 30-year-old engineer and an 11-year-old girl in The Door into Summer or the more overt intra-familial incest in To Sail Beyond the Sunset and Farnham's Freehold. Peers such as L. Sprague de Camp and Damon Knight have commented critically on Heinlein's portrayal of incest and pedophilia in a lighthearted and even approving manner.

source: 'Robert A. Heinlein'; en.wikipedia.org/wiki/Robert_A._Heinlein; Wikipedia; Copied from Wikipedia: 13 January 2018