Read this review called “Chinese Take-Away” of Kowloon Tong. What do you learn about the novel from the review? What kinds of questions would necessitate consulting the book directly? You'll also find links to other reviews on this page. (Free registration required.)
As you know, one topic Theroux's written about is masculinity. Take a look at this slide show called “Masculinity and Academic Discourse” and see how you can relate it to Theroux's work.
Theroux is also very well known for his travel writing. Does that genre interest you? Take a look at this directory from Yahoo.com to learn more about it.
Theroux has also been a contributor to the movies. Read this review of a film adaptation of his novel The Mosquito Coast, starring Harrison Ford. Have you seen it? If not, do you want to see it after reading the review? Why or why not?