Hello, Pigale!
I found his books to be very readable and yet I don't read fiction.
I would not put anyone off from trying one.
His books on the South Seas are very good.
I think my favourite was Centennial, though.
He created excellent characters and good plot lines.
(Though one of my favourite characters in it was killed by a rattlesnake!)
That is only my opinion, though.
Others may think differently.
But his books sold in millions.
"South Pacific" was turned into a musical and film.
"Until They Sail" was made into a film, and "Centennial" became a mini-series on TV.
The only non-fiction work of his I have read is
"Kent State:What Happened and Why."
And that was many years ago!