Lawrence Durrell, while not unknown now, was once a more famous writer; after his Alexandria Quartet (1957-1960) came out, he was apparently considered for the Nobel Prize a few times in the early to mid-60s. In the discussion for the 1961 prize the committee looked askance at his 'monomaniacal preoccupation with erotic complications.' The situation hadn't changed much by 1985.
But neither the Alexandria Quartet or the Avignon Quintet are, in fact, monomaniacally preoccupied with sex. Just maniacally. There's a lot of other things going on, too. Durrell was a skilled travel writer; both series make good use of place. Both have thriller plots and secret societies.
And both have philosophical underpinnings: in the later work, Durrell is interested in Gnosticism, and uses it to complicate his structure. In a Gnostic world, we deal most immediately with a malevolent creator god; the true god lies behind that and does not directly affect our physical world, and only by learning, by knowing (gnosis) can we come to perceive that true god. For a Christian gnostic, that true God is Christ. In the first volume of the Avignon Quintet, (Monsieur) we start with a story about a love triangle in the south of France; it involves a novelist Sutcliffe; by the end of that first novel we learn the story we started with is written by a novelist character Aubrey Blanford as a sort of roman-a-clef. And in case we didn't make the connection, the last lines of the first novel remind us "D. begat Blanford" who then begat Sutcliffe and the other characters.
Your mileage may vary with this sort of thing. It can quite easily fall into pretension, and I'm afraid I felt it did. And the final novel was the most impressionistic, most discursive in its style. There's a lot of verse in the last volume, spoken by more than one character. Durrell tells us he's got a plan. In the words of Aubrey Blanford:
The old stable outlines of the dear old linear novel have been sidestepped in favor of soft focus palimpsest which enables the actors to turn into each other, to melt into each other's inner lifespace if they wish.He says that like it's a good thing...
In the end, though, there was enough in this to get me to finish it. Do I recommend it? I'm afraid I can't. I expect, I hope--unless I was really mistaken about the Alexandria Quartet and it wasn't good--that this was a mistaken attempt on the part of Durrell to capture that same lightning in a second bottle and it was doomed to failure.