This book provides an overview of the scientific and technological research and development that went on to support SOE operations, and those of other forces, notably the airborne. Covering the challenges faced to ensure equipment developed in the lab was fit for purpose in the field. What comes out is some of the great results achieved - the welrod for example - and some of the areas where results were less than satisfactory, particularly in the field of submersibles.
What this book lacks (by its own admission) is linkages to the use of the equipment in the field, with only one short chapter referencing some case studies. As a result the reader is left without any context of the importance of the role played by R&D. Equally coverage of everything, necessitates a relative light touch approach, rather than greater depth into smaller number of issues.
An interesting book, that leaves the reader wanting to know more.