These are recommendations from teams that have been to Haiti.
Books

Haiti: a guide to the people, politics and culture
Charles Arthur
Read More

When Helping Hurts: Alleviating Poverty Without Hurting the Poor…and Ourselves
Steve Corbett, Brain Fikkert, John Perkins
Read More

Handbook of Medicine in Developing Countries
Dennis Palmer and Catherine Wolf
Read More

Creole Made Easy
Wally R. Turnbull
Read More
Google Translation
Haitian Creole
French