Tanks on the Somme: From Morval to Beaumont Hamel.
Most Great War histories and memoirs merely mention the advent of the tank, including perhaps some commentary on the controversy about their adoption, and their initial problems with mechanical failures and deployment on poor terrain. This book goes into what detail may be found about each known tank engagement.
It’s well enough written to be readable, although a thorough knowledge of the Somme campaign is necessary to follow the text. There are maps, but many of them are blurry. A few black-and-white photos of the terrain are included. A very brief index lists personal names and units involved in the action. There are also “Field Guide” comment sections for those who intend to visit the battlefield.
If your research requires a little more depth of description of the tank’s debut than is usually available, this could be a helpful resource.