First, I am not sure what is being asked. It could be a question on how to write a macroeconomics book for people in the emerging market economies or a macroeconomics book on emerging market economies for people in any culture. I am assuming the question is about writing a macroeconomics book about emerging market economies.
An important feature to include in an economics textbook covering any country besides the United States is input-output theory. The United States is the only country that does not use it for economic development planning, although some regional areas within the U.S. do. Input-output theory is so important that the United Nations requires an input-output analysis before giving money for projects.
Another aspect to include is how the political system may affect the economic system. Different political systems may have different views on how much government can intervene in business. Some countries might nationalize certain market sectors, some might nationalize certain unprofitable companies, and some might nationalize profitable companies.
Polical economy of emrging market economies may reqiure attention .
Anothaer aspect is the 'Dualism' in organisation which impacts on the effectiveness of fiscal and monetary policy.