 What is NOT a reason that a child probably shouldn't read this?
Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Obviously there was no contact throughout the ages before space travel— and yet each planetary race can interbreed with a minimum of ten others ! "Outside of your own world, there's nothing like your species, except superficially, and that's true of all other creatures, intelligent or not, with the sole exception of mankind. Actually, the four of us here, though it's accidental, very nearly represent the biological spectrum of human development. "You can read it if you want," offered Taphetta. It was probably nothing to become alarmed at, but an animal on the ship was a nuisance, doubly so because of their pilot.
 There was gun violence (with space rays)
 There was casual sexism  There were implications of sex  There was gun violence (with space rays)  There was abuse between partners