However, it's pretty dismissive, so if such things annoy you, best to stop reading now. I'll insert a little spoiler space to help:
In a footnote to a passage describing his passion for a fellow student, Hitchens writes:
"It was Guy, now dead for some time but in his later years an amazingly successful seducer of girls, who first insisted that I read the Greek-classical novels of Mary Renault. If this was all he had done for me, I would still be hoarsely grateful to him. While other boys plowed their way across the puerile yet toilsome pages of Narnia, or sank themselves into the costive innards of Middle Earth, I was following the thread of Ariadne and the tracks of Alexander. The King Must Die; The Bull from the Sea: Athens has seldom trumped Jerusalem with greater style or panache."
I'm a bit suspicious of this passage, since it's describing Hitchens (b. 1949) when he was the equivalent of a high school student, apparently roughly 15 or so (circa 1964), which seems about right for folks to read LotR but a bit old to be discovering Narnia for the first time.
The irony, of course, is that Hitchens apparently doesn't know that both Tolkien and Lewis were admirers of Renault's work, particularly the two novels he cites. So while he drags them in to score some points, they wd actually have been in agreement with him about Renault's merits.
current audiobook: HITCH-22
current novel: THE RED PYRAMID