Well, I was surprised to find there's more there than you'd expect if you dig a little deeper. The history and geography of the place is amazing--and remarkably intertwined. The island gets so little rainfall it's pretty barren. But with a little agricultural nudge, the Dole Pineapple Company was able to grow and ship millions of pineapples out of there for decades. Now the pineapples are gone (and the dry empty fields really look forlorn) but the Four Seasons Hotels Group manages to keep up two of the world's most spectacular (and pricey) golf courses. And everyone knows golf courses suck up TONS of water.
The history extends beyond pineapple, of course. The island was pretty much shunned by ancient seafaring people who came to Hawaii because it was dry, but it was a great place to exile people from other islands who had fallen out of favor with the rulers--sort of like Molokai became the place lepers (people with Hanson's Disease) were sent.
One cool thing about Lana'i is the people who did manage to eke out an existence there were hardy folks. And they must have had a lot of time on their hands because they came up with some great stories. Nearly every geological highlight on the island--from Sweetheart Rock to the Garden of the Gods--has a long-winded tale of how it came to be called that.
When I read a mystery that features a special setting I expect to learn something about the place while I figure out "whodunit." Hopefully, you'll learn some interesting things about Lana'i when you read "Lana'i of the Tiger." I know I did while writing it.