Somewhat interesting book about immigration. Includes stories from around the world, definitely not US only! Even though the US is home to more migrants than any other country, more than 60 others have higher percentages of foreigners.
The law of supply and demand dictates that labor will always be mobile. Businesses can pay migrant laborers less money, but the laborers earn more than they would back home. Their demand rises and falls with the economy but the overall appetite in the developed world seems unrelenting. We need our fix as we are hooked! Unless massive income disparities are eliminated or reduced, we will always have people moving to earn a better wage.
Would recommend to anyone interested in the immigration debate!