This document summarizes Radtac's experience with agile transformations, including: 1) Their major case study transforming William Hill Online through adopting agile practices to improve delivery of the Trafalgar project and allow faster response to changing demands. 2) Other notable case studies Radtac has conducted, though these are not described in detail. 3) How Radtac wrote their book "Agile Foundation" to provide an unbiased overview of agile principles and practices and support the BCS Agile Foundation certification. They engaged a team of agile experts and practitioners to collaboratively write and review the book using agile methods.