Null-ABC by H. Beam Piper is a captivating science fiction novel that explores the concept of alternate universes and parallel dimensions. The story follows the protagonist, Soames, as he navigates a world where social norms and laws differ drastically from our own.

Piper does a fantastic job of world-building, creating a universe that is both familiar and alien at the same time. The concept of the Null-ABC, a substance that nullifies gravity, is particularly intriguing and serves as a central plot point throughout the book.

The character development in the novel is also well-done, with Soames serving as a compelling and relatable protagonist. His journey to understand the mysteries of the Null-ABC and its implications for his world is both engaging and thought-provoking.

Overall, Null-ABC is a thought-provoking and entertaining read that will appeal to fans of science fiction and alternate history. Piper's writing is engaging and immersive, making this book a must-read for anyone looking for a unique and intriguing story.

Book Description:
"There's some reaction these days that holds scientists responsible for war. Take it one step further: What happens if "book-learnin'" is held responsible ...?"