Don't leave Earth without it.

Mere seconds before the Earth is to be demolished by an alien construction crew, Arthur Dent is swept off the planet by his friend Ford Prefect, a researcher penning a new edition of "The Hitchhiker's Guide to the Galaxy."
The Hitchhiker's Guide to the Galaxy keeps every mind human — it fights its subject at zero distance. The story fights on E8/E9/E10 of the E0–E14 reality ladder, compressing bureaucracy, absurdity, technology, culture, existentialism.