There’s signs from ex-library. This hardcover book titled "Wilhelm Conrad Ron then: Discoverer of X-Ray" by Arnulf K. Esterer is a must-have for any collector or enthusiast of vintage science books. The book, released in 1969, provides a detailed account of the life and discoveries of Wilhelm Conrad Rontgen, the famous German scientist who is credited with the discovery of X-rays.

The book is in great shape and has been well-preserved, making it an excellent addition to any collection. The binding is hard and sturdy, and the pages are clean and free of any tears or folds. This is a rare opportunity to own a piece of history, and it would make a great gift for anyone who is interested in vintage science books or the history of science.