What is unreasonable search and seizure?

"The Fourth Amendment of the United States Constitution is more than 200 years old. It was written in response to a very specific action on the part of the British government during the colonial era. So how is it relevant today? This book examines the ways a law written to protect homes, people, and material possessions has changed to adapt to technology that didn't exist at the time it was written"--Provided by publisher.