With the publication, in the July 1941 issue of Astounding Science Fiction magazine, of the story Seesaw, van Vogt began unfolding the complex tale of the oppressive Empire of Isher and the mysterious Weapon Shops. This volume, The Weapon Shops of Isher, includes the first three parts of the saga and introduces perhaps the most famous political slogan of science fiction: The Right to Buy Weapons is the Right to Be Free. Born at the height of Nazi conquest, the Isher stories suggested that an oppressive government could never completely subjugate its own citizens if they were well armed. The audience appeal was immediate and has endured long beyond other stories of alien invasion, global conflict and post war nuclear angst.

The god Ptath is flung into the far future by a deadly rival and given the mind of a 20th century man. Stranded in this alien world, he must fight to regain his powers before the rival goddess sends the world spinning into chaos and darkness. "Van Vogt's work has a raw power that has never been equalled in science fiction".--Damon Knight.

Det allra första numret innehåller första delen av A.E. van Vogts klassiska roman "Slan" samt novellerna "Interplanetariska konservburken" av Ross Rocklynne, "Den repulsiva faktorn" av Charles Eric Maine och "Gamle Henderson" av Kris Neville. Dessutom klubbnytt, en artikel om trafik i världsrymden 1960 och mycket annat.

Andra numret av Häpna! innehåller bland annat noveller av Raymond F. Jones (Vattenskräcken), John Scott Campbell (Utopia) och Sture Lönnerstrand (Barbaretos). Dessutom del två av A.E. van Vogts följetong "Slan".

Majnumret av science fiction-tidskriften Häpna! innehåller förutom artiklar och recensioner följande noveller:
- A.E. van Vogt "Slan" (följetong, del 3)
- Cleve Cartmill "Farlig teori"
- Kris Neville "Tillbaka efter 400 år"
- Forrest J. Ackerman "Den obesvarade frågan"

Det fjärde numret av Häpna! bjuder på följande noveller:

- A.E. van Vogt "Slan" (följetong)
- Arthur C. Clarke "Överlägsen seger"
- Charles Eric Maine "Genljud från det förgångna"
- Charles Beaumont "De vackra människorna"
- Edmund W. Hansen "Intermezzo"

Dessutom artiklar om atomur, atombomber och solförmörkelser.

A l'autre extrémité de la galaxie, Gilbert Gosseyn se réveille à bord d'un astronef inconnu... et dans un nouveau corps, Gosseyn trois. Pourtant, il conserve les souvenirs de ses deux précédentes incarnations, et peut même communiquer par télépathie avec Gosseyn deux, qui vit toujours, quelque part. Peu à peu, Gosseyn retrouve la maîtrise de ses extraordinaires pouvoirs mentaux. Il parvient à regagner la terre et retrouve ses compagnons qui l'ont aidé à combattre Enro le rouge. Mais n'est-ce pas plutôt son alter ego Gosseyn deux que ceux-ci ont aidé ? La machine des jeux, même démantelée, pourra-t-elle l'aider à trouver la raison de ce dédoublement, de cette "similarisation" ?

Gilbert Gosseyn, the null-A genius of the Earth-Venus war, never realized that this interplanetary war was but a borrowed incident in a greater conflict until he was thrust onto the galactic battlefield as a mere pawn. But in picking Gosseyn as "expendable," those cosmic opponents unleashed forces they had never dreamed existed. One was the entrance of a powerful third party in the war. The second was the ability of certain other pawns to foresee the future. Finally, there was the secret of Gosseyn's original purpose - a secret which could decide the fate of the entire galaxy!

Le matin même, Gilbert Gosseyn avait quitté Cress-Village en Floride pour se rendre dans la capitale et tenter sa chance auprès de la Machine des jeux.
A l'hôtel il reconnait un voisin et le salue. Ce simple geste fait basculer son univers quotidien dans une sorte de cauchemar. Ainsi, il apprend qu'il n'existe aucun Gilbert Gosseyn dans son petit village de Floride et que sa femme Patricia, décédé un mois plus tôt, n'est pas morte et qui plus est n'a jamais été mariée !
Alors Gosseyn entreprend la plus fantastique quête qu'un homme puisse faire, celle de sa propre identité.

The classic novel of non-Aristotelian logic and the coming race of supermen

It is the year 2650 and Earth has become a world of non-Aristotelianism, or Null-A. This is the story of Gilbert Gosseyn, who lives in that future world where the Games Machine, made up of twenty-five thousand electronic brains, sets the course of people's lives. Gosseyn isn't even sure of his own identity, but realizes he has some remarkable abilities and sets out to use them to discover who has made him a pawn in an interstellar plot.

Science Fiction Grandmaster A. E. van Vogt was one of the giants of the 1940s, the Golden Age of classic SF. Of his masterpieces, The World of Null-A is his most famous and most influential. Published in 1949 it was the first major trade SF hardcover, and has been in print in various editions ever since.

The entire careers of Philip K. Dick, Keith Laumer, Alfred Bester, Charles Harness, and Philip Jose Farmer were created or influenced by The World of Null-A , and so it is required reading for anyone who wishes to know the canon of SF classics.

In this sequel to World of Null-A, Gilbert Gosseyn must learn to use both his brains and function in various bodies in order to save the universe from Enro the Red.