The Book in Brief
Lors, an extraterrestrial Firstspacer, crashes near the home of Nick and Beth Danson and emerges with damaged memory. Because he looks like Nick, Beth assumes he is her husband. Lors accepts the identity while trying to recover his mission and avoid investigators. His growing attachment to Beth complicates both his alien duty and the deception.
The real Nick has been taken aboard the alien ship, and both Terran and alien agents converge on the case. Deaths and substitutions allow the visitors to contain public knowledge. Lors ultimately yields Nick's life back to him, leaves Beth, and returns to Jela and his own people, while a controlled explanation conceals what actually happened.
Important Characters
Lors: An alien Firstspacer who assumes Nick Danson's identity after a crash.
Beth Danson: Nick's wife, whose trust and attraction make Lors's impersonation emotionally consequential.
Nick Danson: The real human whose temporary removal makes the substitution possible.
Nolan Brice: A dangerous human investigator whose pursuit threatens the alien operation.
Cartwell / Nesso: An alien operative maintaining cover within the investigation.
Commander Imry: A leader within the extraterrestrial mission.
Jela: Lors's alien partner and emotional connection to his own world.
Narvi: Another member of the off-world group managing the crisis.
Chapter-by-Chapter Summary
The headings and sequence follow the complete 19-chapter Project Gutenberg edition, which numbers chapters in words; chapter recaps were written directly against that text.
Chapter 1
A man wakes beside burning wreckage with no memory; a wallet identifies him as Nicholas Danson of Everett, Pennsylvania. Wary of contacting police, he hikes to an isolated gas station, where old Andy Hocum offers him a cot and a ride to town.
Chapter 2
Detective Nolan Brice, in love with Beth Danson, urges her to accept her vanished husband's death, and she gently refuses him. At headquarters, Secret Service agents Cartwell and Morgan enlist Brice to hunt an unidentified craft believed downed nearby.
Chapter 3
After dreaming of a golden-haired woman who calls him Lors, Nick learns two strangers have asked about him. Andy drives him to Everett, where Beth faints at his return; he discovers he has been missing thirteen months and swears her to secrecy.
Chapter 4
Beth coaxes her amnesiac husband into bed; he then dreams vividly of being Firstspacer Lors battling nine-foot rebels on the planet Thista. Downstairs he spots the strangers' black Chevrolet watching the house, and Beth stuns him by insisting he has never flown.
Chapter 5
At the crash scene, FAA investigator Dickson notes the craft has no wings or tail. Brice finds Nick's gold watch, engraved from Beth, and quietly pockets it, concealing evidence for the first time while dreading what Danson's return would mean.
Chapter 6
The newspaper describes the wingless mystery wreck and places Brice among its investigators. When Beth admits the black car tailed her to work, they decide Nick will hide at their remote cabin, while another flash of alien memory frightens him.
Chapter 7
Beth drives Nick secretly to the cabin and shows him his painting studio, with canvases of herself and of a model named Janet Holman, none of which he remembers. Afterward they undress and make love before the fireplace.
Chapter 8
Alone after Beth leaves, Nick dreams of a metal room holding a sleeping double of himself who wakes laughing horribly. He searches the cabin in vain, straps on a .44 revolver and shoots with uncanny skill, then returns to find Janet flinging herself at him.
Chapter 9
Linguist Professor Nichols declares the writing on the wreckage matches nothing spoken or dead on Earth, and Morgan concludes they have a spaceship. Brice privately reasons an alien has replaced the abducted Nick and races off, terrified for Beth.
Chapter 10
After bedding Janet, Nick sees his draft card lists a forearm scar he lacks and realizes he is not Danson. Brice arrives shooting but vanishes skyward in mid-charge; Beth doubts the story, and that night unseen hands chloroform Nick.
Chapter 11
Nick wakes among the two watchers, actually spacers Narvi and Thesa, and his memory returns: he is Firstspacer Lors, surgically altered under Commander Imry's scheme to replace the kidnapped Danson as a roving agent. He stuns Narvi by declaring he loves Beth.
Chapter 12
Narvi flies Lors by scout ship up to the starship, where he reports to Commander Zark, Jela's father. Zark rages against Imry, plans to bury the crash through agents in Washington, and proposes killing Danson and Brice to preserve the masquerade.
Chapter 13
Lors visits the captive Danson, who has secretly mastered the aliens' language and bitterly rages at his confinement. Lors advises him to conceal his intelligence, hinting at a plan, then enters his borrowed quarters to find Jela waiting on the bed.
Chapter 14
Jela and Lors reunite and make love in the darkened quarters. Afterward he admits to himself that a life with Beth is impossible, yet resolves to risk everything on an unauthorized scheme to secure her happiness, whatever Zark would say.
Chapter 15
Lors secretly offers Danson escape: disguised in a Firstspacer uniform, Danson will slip down to the hangar while Lors retrieves Brice. Over drinks, Lors persuades a grumbling Narvi to stand in for the guard at Danson's door.
Chapter 16
In the ship's hospital, Lors talks Doctor Zuloe into admitting him to Brice, then clubs the guard so the detective can take his uniform. Instead of cooperating, Brice punches Lors and bolts down the corridor alone with the guard's auto-rifle.
Chapter 17
Brice shoots his way along the corridor until spacers gun him down. Lors reaches the hangar, knocks Danson out when he refuses to go without Brice, loads him into a scout ship, and blasts free of the starship with pursuers launching behind.
Chapter 18
Four scout ships chase Lors toward Earth at speeds beyond twenty thousand miles per hour; he dodges their rockets, buzzes a freighter, and loses them in heavy cloud. Landing by the cabin, he carries the unconscious Danson inside and turns to face Beth.
Chapter 19
Beth already knows the truth: Cartwell reveals himself as Firstspacer Nesso, an alien agent who told her everything. They agree to pass off Brice's death as a disappearance in the woods, and Lors bids Beth farewell, flying back to the starship and Jela.
Ending Explained
Who returns to Beth?: The real Nick Danson is restored to his Earth life. Lors does not permanently steal the man's marriage.
What happens to Lors?: He leaves Earth and returns to his own people and to Jela after choosing mission responsibility over the human identity he briefly desired.
Does the public learn about the aliens?: No. The agents use substitutions and a controlled crash narrative to keep first contact secret.
Themes and Motifs
Identity without memory: Lors must perform a life whose emotional history he does not possess.
Desire versus duty: His attachment to Beth conflicts with obligations to Nick, Jela, and the mission.
The ethics of infiltration: The plot repeatedly tests whether a strategic deception can avoid becoming personal exploitation.
Secrecy and first contact: Both sides prefer a contained lie to the destabilizing truth of alien presence.
Content Notes
Includes sexual situations and marital deception, though the novel is less explicit than its title suggests; shootings, deaths, abduction, impersonation, and amnesia; dated gender roles, sexual attitudes, and pulp-era stereotypes.
About the Book
Best for: readers who collect pulp-era oddities — a 1962 identity-swap SF romance whose lurid title wildly oversells it. Narrative shape: 19 chapters of crash, imposture, investigation, and a quiet restoration. Central contrast: an alien performing a borrowed marriage versus the duty that finally reclaims him. Overall assessment: 3.5/5 for a genuinely interesting emotional premise in dated pulp machinery. Source-checked scope: 19 distinct reading units in Project Gutenberg eBook #40284; no front matter was counted as narrative content.
Primary text: Michael Knerr, The Sex Life of the Gods, Project Gutenberg eBook #40284. The complete text contains 19 chapters. The title is reproduced as published. The review, plot account, ending analysis, and every structural recap in this guide were checked against that edition.
Selection evidence: Project Gutenberg Top 100 EBooks in the last 30 days — rank #51 with 82,526 downloads in the August 4, 2026 snapshot. Books already completed in the preceding batches were excluded.