In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

AHS is often caused by brain injury or neurodegenerative illnesses, but there is not enough research to determine any consistent cause or why it occurs. “Alien hand is little investigated because it ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Rhea Seehorn in "Pluribus." ...