While going through lengthy google searches and going through pages after pages to do research to plan out our Dominican Republic trip, I fond a really nice guide that really goes through each and every city that is popular with tourists and then also gives lots of very useful information on the Dominican Republic. Here is the link go the Dominican Republic 411 Guide.
The Dominican Republic is such a diversified country that you really should spend some time reading through information that you can find online and maybe even check out some books from your local library. I will tell you though to take any information you find in book that is more than say 3-5 years old with a grain of salt because the Dominican Republic is an emerging economy that is growing by leaps and bounds and the tourist industry is the fastest growing sector of this.