Sometimes things happen to parents that make it impossible for them to care for their kids—it could be illness, incarceration, job loss, or other reasons. Fortunately, there are loving parents who are willing to take in, or foster, kids who need someone to look after them. This book looks at how foster families are made and how they might thrive. What is a family? What used to seem like a simple question has grown ever more complex. The set explores the different types of family structures that have become increasingly common in the 21st century.