Encyclopedias and dictionaries are useful publications to get a first introduction to a specific topic. You will find explanations and definitions for specific terms as well as references and suggestions for further reading.

For economics, New Palgrave dictionary of economics is a good resource. 

The Statesman’s Yearbook, is an annual publication covering the politics, cultures and economies of all of the countries of the world plus major international organizations.

Also, check out Britannica online which includes the complete encyclopedia, as well as Merriam-Webster's Collegiate Dictionary and the Britannica Book of the Year.

Below, you will find a few other suggestions of encyclopedias within some of the fields of business and economics. To find others you can search in Primo for encyclopedia/dictionary and your field of study.