Learn to build a simple REST API using Go programming language and the Mux router in this 44-minute tutorial video. Explore Go fundamentals for beginners while creating endpoints for getting all books, retrieving a single book, adding new books, updating existing entries, and deleting books. Follow along as the instructor demonstrates how to set up the Go environment, create struct models, start a server, and use Postman for testing API requests. Gain hands-on experience with Go's HTTP handling, JSON encoding/decoding, and RESTful API design principles.