Direct from Who HQ, the team that brings you the New York Times Best-Selling Who Was? biography series, comes Who HQ Presents. These short illustrated e-Books provide quick, simple answers to the important questions being asked today about politics, social issues, the environment, and more!What is immigration? Wonder no more: Who HQ Presents answers about the various reasons people immigrate, the different waves of immigration throughout American history, and what might happen with immigration in the future.