There are five books in this series all of which, in my opinion, are completely original, enrapturing and thought-provoking. The author, Isaac Asimov, has been described as the creator of science-fiction. His books are millienia ahead of their time. I would definitely recommend reading the books, however, they get quite heavy and mentally challenging in the last two. An awesome read.
The thing about plummeting downhill at fifty miles an hour on a snack platter - if you realize it's a bad idea when you're halfway down, it's too late. — Rick Riordan, The Son of Neptune
