The practice of test automation is invaluable for modern software testers. Done well, it significantly increases software testing's efficiency, effectiveness and coverage and is essential for continuous testing and continuous delivery. This comprehensive guide covers test automation in-depth for medium- to large-scale implementations, from the benefits of test automation to defining, developing and implementing a test automation approach that is fit-for-purpose, to planning, designing and executing test execution scripts and frameworks. Real-world scenarios, activities and exercises are included throughout.