If you’re asking that question, you might want to check out the online brainchild of Thoughtplay, the people who launched the US 2008 election project “Who Should You Vote For”.
What Should I Read Next?, or WSIRN for short, provides a mass opinion database for recommendations, which improve as the database grows. Books are associated by virtue of sharing the same favorites list; so, the more often a book appears on different lists, the more that association strengthens.
If you want a recommendation, enter a book at WSIRN, confirm the right title/author or ISBN, and get your recommendations. (When I entered one of my favorites, Murakami’s The Wind Up Bird Chronicle, I interestingly got pointed to a lot of W.G. Sebald, once an instructor at UEA where I did my masters in creative writing). Entering your own list of favorites will help focus your recommendations and of course, help the collective.
For more local and perhaps personal recommendations, you can always check the reviews on this site, and don’t forget about hearing authors live and in person this weekend at the Hawai‘i Book and Music Festival.