Isaac Asimov, The End of Eternity. Originally published by Doubleday, 1955. The cover illustration is from the 1959 Panther edition.
NOTE: This book is now so old and well-known that I will not take any care to obfuscate the plot for those who haven’t read it.
I’m always on the hunt for bedside reading material: light and fluffy stuff that won’t suffer for being used to put me to sleep, but that won’t just bore me to distraction.
Unlike years ago, my bedside reading ‘stack’ is now just a tablet with an ebook library. That encouraged me to start duplicating old paperback faithfuls with digital counterparts. A recent spurt of acquiring old science fiction as new ebooks included a swag of Asimov. That guy was a factory!