"New Bodies for Old" is a classic science fiction novel written by the French author Maurice Renard. The novel was first published in 1923 and is still considered one of the most influential works of early science fiction.

The book tells the story of a scientist who has developed a machine that can transfer human consciousness from one body to another. He uses this technology to help a wealthy man who is dying, but the transfer goes awry, and the two men find themselves trapped in each other's bodies.

As they try to adapt to their new bodies and figure out how to reverse the process, they encounter various challenges and ethical dilemmas. The novel explores themes of identity, mortality, and the consequences of playing God.

Renard's writing style is engaging and immersive, and he does an excellent job of building tension and suspense throughout the book. His descriptions of the technology and the process of body transfer are vivid and imaginative, and his characters are well-developed and relatable.

"New Bodies for Old" is a must-read for fans of classic science fiction and anyone interested in the ethical implications of technological advancements. It's a thought-provoking and entertaining novel that has stood the test of time and remains relevant today.

Overall, Maurice Renard's "New Bodies for Old" is a fascinating and insightful exploration of the human condition, and it's no wonder that it has remained popular among science fiction fans for almost a century.