"Stunning. I'm still reading the sequels, but based on what I've read so far, this is a series that can transcend the genre an become an all-time literary classic."
"A unique book. This extended version almost reads like a philosophy lecture at times, but is no less amazing for it and shows what seems now amazing insight for the early 60's."
"Paul Cornell is best known as a TV writer having written episodes for Doctor Who, Primeval and, er, Robin Hood - but don't let that put you off, this is a brilliant, brilliant book."