Green cards, visas, and more: What every prospective immigrant to the U.S. needs to know An info-packed guide that covers both eligibility for U.S. visas and green cards and the practical requirements for obtaining them. Readers will learn how the U.S. immigration system really works and whether they qualify for either a green card based on family or work, a temporary visa such as for study, work, or a cultural exchange, or another program or remedy, such as asylum or DACA. Useful for both would-be immigrants and those who assist them.