Who invents what – where, when, and how? Great innovation often depends on collaboration. Sometimes a necessary outcome can redefine the intrinsic approach (see also, ‘when the going gets tough, the tough get going). Giffard can be a bit full-on as a technical author but if you’re not up to speed on technological innovations of the time, don’t worry. This book will take you step by step through the development of jet engines during the second world war. Jettison your preconceptions. By comparing the approaches of protagonists from Germany, Britain, and the United States, Giffard makes the excellent case that jet engines weren’t in fact produced by lone inventors or scientists, but by a variety of protagonists – collaborating, almost – from very many well-known industrial firms.