You’re now taking the first steps toward mastery of serverless architectures. The first part of this book takes you through the concepts and introduces you to the five principles of serverless architectures. You’ll learn about several useful designs and architectures, and you’ll begin building your own media-transcoding pipeline using Lambda, S3, and the Elastic Transcoder. Beginning with the third chapter and continuing thereafter, you’ll find fun exercises to try in your spare time. These exercises are optional but highly recommended, because they’ll reinforce your knowledge and understanding of serverless technologies and architectures.