Sci-fi book from the 80’s or 90’s; aliens control humans using a cap
46635
Book series about aliens who put "caps" on people to control them
131008
Story or Novella about Remote Controlling/Possession Human Beings
37618
YA novel from pre-1980 set on the moon in which a boy is rescued by space gypsies
70546
Children's sci-fi book with an alien named Yacob looking for a kid with technology
96874
90's TV; alien ships appear, tell humans to "do better"; turns out they wanted weapons
118738
Need help to find a sci-fi collection I read at school (mid 80s)
141943
80s/90s book where boy stumbles on game where aliens gamble their planets
15303
novel identification: alien scientists must save their civilization from future destruction
81131
Post-apocalyptic book where people can enhance or alter their appearance with animal qualities
89070
Unknown Science Fiction Space Book
58614
Book about space alien cats
155483
Science-fiction book where the protagonist has a hidden blade inside his body
94161
Trying to remember title of a book about people on an asteroid/comet
126070
Looking for an old story where humans conceal their newly-discovered psychic abilities from alien visitors
85251
Tracking down an old sci-fi book
126418
Story about encounter with hostile aliens
6794
Book about aliens arriving in an old country; people capture their spaceship and arrive at alien's planet