I posted the audio to Arthur C. Clarke “Childhood’s End” 1953 AD.
The book has it all; it has obviously been very influential as it includes giant alien spacecraft being stationed over Earthly cities (as in the new War of the Worlds, District 9, the new V series, etc.), it contains ancient alien astronauts themes, it contains mystic-mythological-theology as the ancient aliens had been confused with being gods, demons, etc. and takes us on a journey long into the future.
Note that due to the manner whereby the system reads number, part 10 is after part 1, etc. since it is reading 10 as being the next number after 1.
You can listen to it on the site or download MP3 at this link.