What’s the first book you ever finished and still remember to this day?

I read physics book and mainly read about universe secrets chapters, which are very informative and interesting post during my childhood days. I like to read about universe,planets, galaxies, universe secrets, and many more during my childhood days and the present time.

Universe is full of secrets and interesting topic for me. I like to read about universe in any book in the present time. I read several theories such as how universe expands, big bang theory, and many more, which are very informative and interesting one. I read about black holes, formation of gakaxies, solar system, and many more in the subject of physics and many other books, which are very informative and interesting one.

Thus, Physics is my good book especially a out universe secrets during my childhood days, which still remember to this day.