"Mastering Kafka Streams and KsqlDB: Building Real-Time Data Systems by Example" is a comprehensive textbook by author Mitch Seymour, published by O'Reilly Media in 2021. The book covers a range of topics including data modeling, design, and processing, with a specific focus on real-time data systems using Kafka Streams and KsqlDB. With 400 pages of content and written in English, this trade paperback offers practical examples and insights for those looking to deepen their understanding and expertise in this area of computers and mathematics.