Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Illegal immigration is defined as the act of living in a country without its government's permission, violating the immigration laws and sovereignty of that country. Generally, illegal immigration occurs when one is forced to leave his/her home country because of poverty, unemployment, low wages and lack of opportunities, to find better living conditions. A new study on illegal immigration to the US shows an increase of Asian immigrants in the United States, surpassing Hispanic immigrants by 5 %. Learn more about the issues of the US illegal immigration in this book.