Mmmm, I can't resist a fun cover like this. Romance! A man in some sort of naval uniform! Mystery! Gold lamé!
The book is part of Kaye's six (or seven?) part series of "Death in..." books. They read quite similar to some of Mary Stewart's works, featuring a girl who must solve a mystery and finds love at the same time. Death in the Andamans had a very...creepy feel to it. Seriously, the atmosphere just seeps out of this book.
The plot is set right before WWII and a group of houseguests get stranded on a little island in the Andamans. A few murders, tropical storms and mysterious happenings later and you've got a good book. This story features Copper Randal (who I always want to call Cooper), who is visiting her friend Valerie.
I personally like Death in Kashmir best, but all Kaye's books are great---they just have that certain 1950s flavor to them. All six (or seven? I really think it's just six, though) were recently republished. Check 'em out!