I have used this book on a number of recce tours to the Somme. When asked, by battlefield visitors, how best to prepare themselves to get the best from their time on the battlefields, I commend Holts' books and maps as a 'get you in pack'. For those who need greater detail and who wish to walk as well as drive, then I commend the Battleground Europe series. Of this series, this book and its companion volume "Walking the Salient" remain my favourites. They're well-researched, packed with quotations and photographs from primary sources, and provide clearly written, easy-to-follow route descriptions and sketch maps. Paul Reed has invested much of himself in becoming one of the current experts and enthusiasts on WWI matters; and he's always happy to share his knowledge and to encourage others through his excellent website.