Trurl and Klaupacius are constructor robots who try to out-invent each other. They travel to the far corners of the cosmos to take on freelance problem-solving jobs, with dire consequences for their employers.

Contents:
• How the World Was Saved
• Trurl’s Machine
• A Good Shellacking
• The First Sally, or The Trap of Gargantius
• The First Sally(A), or Trurl’s Electronic Bard
• The Second Sally, or The Offer of King Krool
• The Third Sally, or The Dragons of Probability
• The Fourth Sally, or How Trurl Built a Femfatalatron to Save Prince Pantagoon from the Pangs of Love, and How Later He Resorted to a Cannonade of Babies
• The Fifth Sally, or The Mischief of King Balerion
• Fifth Sally(A), or Trurl’s Prescription
• The Sixth Sally, or How Trurl and Klapaucius Created a Demon of the Second Kind to Defeat the Pirate Pugg
• The Seventh Sally, or How Trurl’s Own Perfection Led to No Good
• Tale of the Three Storytelling Machines of King Genius
• Altruizine
• Prince Ferrix and Princess Crystal