If you were gripped by the mounting paranoia and gradual realization in They Walked Like Men—as journalist Parker Graves uncovers the insidious alien takeover happening under the noses of ordinary people—you’ll love The Body Snatchers. Here, Dr. Miles Bennell discovers townsfolk are being replaced by perfect duplicates, creating a similarly tense, goal-driven quest to expose and stop a covert invasion before humanity is lost.

Enjoyed following Parker Graves’ perspective as he uncovers a strange conspiracy in They Walked Like Men? Then The Demolished Man will appeal to you—the narrative sticks close to Ben Reich as he plots a murder in a world of telepaths, immersing you in a tightly woven, suspenseful story seen through one compelling viewpoint.

If you appreciated the psychological depth and uncertainty in They Walked Like Men, as Parker questions who around him can truly be trusted, Who? will keep you riveted. The story follows a man returned from captivity with a new metal face, prompting authorities—and the reader—to question his identity and loyalties in a world where nothing is as it seems.

If the covert alien invasion and the mounting sense of paranoia in They Walked Like Men drew you in, you’ll be hooked by The Puppet Masters. Heinlein’s tale features slug-like invaders that attach to humans and control them, leading to a race against time as a small group tries to expose and fight the hidden threat manipulating society.

If the subtle social commentary and allegorical elements in They Walked Like Men resonated with you—using aliens to question human nature and society—you’ll appreciate The Midwich Cuckoos. When an English village wakes to find all women pregnant with mysterious children, Wyndham uses this premise to explore themes of conformity, fear, and humanity’s response to the unknown.