What are some good books and online sources that will help me learn more about the hotel and hospitality industry?

principales of hôtel management 

in http://ir.nmu.org.ua/bitstream/handle///fbe0a3dea4adcaa2e.pdf?sequence=1

Principles of Hospitality Management (course )

in 

http://www.faulknerstate.edu/sites/www/Uploads/files/Programs/Hosp/HOSPITALITY%MANAGEMENT%Course%descriptions.pdf

principle of Hotel Management. HACCP review

"Setting the Table" by Danny Meyers. He is an American legend when it comes to hospitality. That book was written in the's and is still a 'bible for hospitality' today.

The role of tourism in national income increaseThe role of tourism in economic developmentThe impact of tourism on the economyMulti expression of Tourism

An Amazon search can support you in narrowing your search down to a particular area of interest

food and beverage cost control (slideshare.net)