I, personally have never heard of travel brochures for countries.
What I have always found to be a great resource is the local library. Skim through both Fodor's and Frommer's Travel Guide Books. They both put out a new edition every year. Both are similar in the information listed.
Once you decide which book is a "better fit" for your needs, head to the local bookstore and purchase it. I usually highlight (in my purchased book only) anything important or monumental that I need to know regarding a port.
That book becomes our bible while we're vacationing and it is 100% indispensable to us.